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Power Head, & Water Pump Review; Aquarium & Pond
REVIEW OF AQUARIUM (& POND) POWER HEAD, PROPELLER, & WATER PUMPS BASED ON REAL WORLD EXPERIENCE (including comments on about.com and thereeftank.com reviews):
By Carl Strohmeyer
- Basic Pump Types
- Head Pressure
- Rio (Taam) PowerHead Water Pumps
- Rio HF Water Pumps
- Maxi Jet Power Heads
- SunSun Power Heads
- SunSun Water Pumps
- Marineland Power Heads
- Hagen Power Heads
- Jebaeo & Finnex Pumps
- ZooMed Power Sweep
- Hydor Koralia Propeller Pumps
- Seio Propeller Pumps
- VorTech Propeller Pumps
- PondMaster Pumps
- Via Aqua Power Head Submersible Pumps
First I would like to recommend readers to look at the following webpage to better understand what aquarium, pond, fountain water pumps would fit their needs best and why:
Water Pump Specifications, Recommendations, Limitations
As to the review, which unlike most articles here at Aquarium/Pond Answers, this one is admittedly more subjective rather than objective since these were not controlled studies in the strictest scientific since. While not to pick on about.com, however after an interesting email form a hobbyist about aquarium power heads/pumps I thought I would investigate what is being said in reviews and stumbled across an article with the reviews of five different power heads at about.com.
Either they are from another planet or I must live in a parallel universe!
First they left off the list some of the best aquarium and pond power head/ water pumps then their reviews were quite contrary to my extensive experience with these pumps in literally 100s if not thousands of aquariums over the years in my aquarium/pond maintenance business.
Basic Pump Types:
I would like to start out that aquarium water pumps come in three basic designs:
- The Power Head Pump such as the Maxi-Jet and SunSun PH; these are best for use with sponge filters or under gravel filter lift tube. This type generally does not have as much head pressure as the submersible pump style and for this reason these do not work well for applications such as running Ultra Violet (UV) Sterilizers, Fluidized Sand Bed Filters, or similar.
However this style is often better for running wave makers than the submersible pump style as these tend to work better in the constant re-start environment of wave makers (I should note that not all power heads work well here either such as the Marineland).
- The Submersible Water Pump such as the Via Aqua and Rio PowerHead/Pump series can function both as an inline submersible pump for sumps, fountains and even ponds as well as for power head applications.
Some (such as the now discontinued Via Aqua 1300) can even be used inline (assuming the there is a direct flow via a bulk head or similar, NOT a siphon loop).
. These are more economical and more basic but cannot be used as a power head either. These are great for water fountains, running certain devices or even sumps. Currently this article does not review any of this sub type.
As noted earlier, this style pump does not function as well in the environment of being connected to electronic wave makers (the best are the propeller pumps I will note next)
- The final pump "type" I will review is the newer propeller style. the Hydor Koralia, AAP/Rio Seio, and AAP/SunSun are popular types of this style pump.
These have almost no head pressure (and as such are utterly useless for powering any device).
However these pumps shine for wave maker use and use the least amount of energy for the water they do move (at 0 head pressure). Another advantage is that these are a very "clean" (aesthetically speaking) water pump application and these pluses make them popular with Reef Enthusiasts.
Where to purchase:
*UV Sterilizer, Clarifier for Aquarium, Pond
*TMC Premium Fluidised Bed Aquarium Bio Filters, Superior to Lifeguard
Finally I will note that most of these pump types (including the basic submersible such as the Via Aqua 305) and with the exception of the propeller pumps have an aeration attachment feature for drawing/injecting air into the water column re-entering the aquarium from the water pump.
See the picture to the left that demonstrates this using a SunSun JP series Power Head.
An aspect of any water pump that is often forgotten, yet can be a significant factor in choosing the correct pump is head pressure.
The most simple description of head pressure is that this is the force placed on the "head" (outlet) of the pump by gravity, weight of the water column past this point, and devices in-line past this point that often constrict or impede flow (such as UV Sterilizer or Fluidized Filter).
Most aquarium water pumps are open impeller designs that are greatly affected by head pressure. Propeller pumps, just by their design, can handle almost no head pressure and thus are only intended for under water applications with no lifting of water out or into an aquarium.
A few pumps such as the Rio HF Pump series have partially closed designs that can handle much more head pressure and are better suited for lifting water through multiple devices or deep sumps (as well as water features in ponds).
The bottom line is regardless of the pump design you choose, know its maximum head pressure so as to calculate what the actual flow will be with the devices you might add in-line.
For instance, do NOT expect a 500 gph pump with a maximum head pressure of 5 feet to pump any more than 300 gallons per hour lifting water 2 feet from a sump to the aquarium.
For a much more in-depth and objective article dealing with calculating aquarium/pond pump head pressure, please see this article:
Head Pressure in Aquarium and Pond Water Pumps
Here are several pump & power head lines I will review (including refutations of others comments if necessary):
Rio PowerHead Water Pumps
*Rio (by Taam); Originally the "Standard" for submersible aquarium, fountain and pond pumps, Rio was later surpassed by their break-away sister company "Via Aqua" with many comparable models based on my professional use (Via Aqua/Commodity Axis has since merged back with Rio/Taam).
However of late, Rio has improved their design of the Rio "Plus" Water pump line with a much better impeller design and it has leaped back over their sister company Via Aqua to once again be the "King" of aquarium, small pond, & fountain water pumps/power heads in their price range.
The Standard Rio Plus Pump has shed the flawed hinged impeller and now has a very durable impeller, along with an excellent epoxy sealed electromagnet motor
Rio power heads are very powerful with excellent head pressure (depending on the model).
The cons with the impellers as of the most recent update are no longer a "con" as the impeller design has been vastly improved to now surpass their sister Via Aqua Pumps in durability.
These Rio Plus Aquarium & Fountain Water Pumps are among the best aquarium sump, pumps for powering equipment such as needle wheel skimmers, small pond or fountain pumps.
The Rio pumps are also reasonably good at starting up when used as wave makers and are properly maintained, although this is not their best use.
Let me now address this comment from about.com:
"These units are known to fail and leak lubricants back into tanks.".
This is simply NOT TRUE.
I have used not a couple, rather 100s if not 1000s of these Rio Plus Pumps and failures are rare, especially since the impeller design was improved and more importantly I have NEVER had one Rio "leak lubricants", so this is a ludicrous statement!
Clearly this is another reason to NOT TRUST about.com, including their scientifically incorrect information about Detritus Worms in aquarium, falsely identifying these annelid worms as the flatworm planaria with some serious implications. Reference: Aquarium Planaria, False Identification
Where to Purchase:
*Rio Power Head Aquarium and Pond Water Circulation Pumps
Such as the popular Rio 1100 pump
*Rio 1100 Water Pump
Rio HF (High Flow) Aquarium/Pond Water Pumps
*Rio, Taam HF Series Water Pumps; the newer HF (High Flow) series is without equal when power, performance and especially head pressure (the ability to lift water vertically) are compared with price for all these abilities.
These pumps hold a patent for their design which includes the unique vortex rotor blade, rare earth magnet and more.
The Rio HF Water pumps are what I would recommend for large aquariums with sumps well below the aquarium and/or with many applications to run.
As well the Rio HF is often a good choice for ponds with water features such as water falls or spitters that exceed 5 feet above the pond level as these pumps often have head pressures of double similar gallon per hour pumps.
For example the Rio 26 HF has a maximum head pressure of 13 feet and it still maintains 75% of its water volume at 6 feet.
Where to Purchase:
*Rio HF Pond, Aquarium Water Pumps
*Rio Model 26 HF Water Pump
Maxi-Jet Power Heads
*Maxi Jet Power heads; I will have to agree the most with about.com on their assessment of these pumps.
They are reliable and economical and start back up easily even when used as wave makers (which is an application these pumps are popular for use in). In fact these are one of the best earlier/1st generation Power Head (only) aquarium pumps.
However they do have their cons and that is they have poor head pressure and are not very versatile (unlike the Via Aqua, SunSun, Rio, & other combination power head/submersible water pumps) as they are only power heads and nothing more.
AAP/SunSun Water Pumps
The SunSun line of aquarium products, in particular the pond, aquarium, and fountain water pumps are relatively new to the North American market, however with the demise of Via Aqua, they are producing many of the same niche of "good value" aquarium, pond, sump, & fountain pumps often based on the exact same designs.
In fact SunSun now has a much larger line of versatile water circulation pumps from basic power heads and simple fountain pumps, to large amphibious and high efficiency pond pumps
After issues with a dishonest aquarium product distributor and reseller that had a part in Via Aqua's demise, I started looking for alternatives and was pointed to this company and its new North American distributor by more than one aquarium professional.
What has come to my attention more and more after about a year of use is the quality and especially the head pressure of these SunSun water pumps.
In fact I found these pumps superior to the Via Aqua and many other pumps I was looking to replace.
Two SunSun Pumps stood out in my use and testing for their quality, head pressure, and over all performance and those are the HQB-3500 and the JP-065.
Both of these pumps beat out any other pump I have used in their category of flow rate. When factors such as price, head pressure, and durability of construction were considered I was pleasantly surprised by how well these pumps matched up.
The HQB-2500 or HQB-3500 is an excellent choice for many aquarium sump applications as well as light to medium duty pond applications such as running Pond UV Sterilizers or Pressurized Pond Filters.
The JP-065 turned out to be a SUPERIOR fountain pump when compared to the Via Aqua 305 and similar pumps (such as the AquaTop) sold by popular low end Chinese importers that we also experimented with.
Another AAP/SunSun water pump of note is the JP-066 for a step up from the JP-065 with superior performance over the Via Aqua 306 aquarium, fountain, pond pump and others.
AAP/SunSun also produces some excellent medium to heavy duty pumps that are excellent for aquarium system use or medium to large ponds.
Two of note are the SunSun JAP-8500 Pump which is an excellent high head pressure pump that is amphibious, menaning it can be in or out of the water.
The other is the SunSun JTP-12000 High Output & Efficiency Pump which uses only 100 watts to produce a flow rate of 3170 GPH.
Where to Purchase:
*HQB-2500 & 3500 Aquarium and Fountain Water Pump"
*AAP/SunSun JP-065 Aquarium and Fountain Water Pump
*SunSun JP-066 Aquarium and Fountain Water Pump
*AAP/SunSun JTP-12000 High Output & Efficiency Water Circulation Pump
*AAP/SunSun JAP-8500 Amphibious Water Circulation Pump, Pond or Large Aquarium System
*TMC Pond Advantage UV Clarifiers, Sterilizer
*Pressurized Pond Filters
SunSun Power Heads
The newest generation SunSun JP Series Aquarium Power Head Pumps are at least 20 years newer than most other power head only pumps such the before mentioned Maxi-Jet.
Bluntly speaking, the Maxi Jet is a design that requires little improvement (I am of the opinion if you design something correctly the first time, little needs to be changed).
What this SunSun Power head has over the Maxi Jet is a more economical pump that has the same reliability and performance!
As with the Maxi-Jet, it is also ONLY for power head use, not applications where head pressure is necessary; these application types fit the SunSun or Rio Powerhead/Submersible Pumps better.
It is also noteworthy that based on our aquarium maintenance experience, the SunSun is superior to the earlier generation Marineland and Hagen Aqua Clear Power Head Pumps.
Where to Purchase: AAP/SunSun Aquarium Power Head Pumps
Marineland Penguin Power Heads
*Penguin Power Heads; I do not generally agree with assessment by about.com on these power heads. Although they do have a neat feature with the reverse flow power head for UG filters (which are not very common anymore), the other nice feature is the adjustable flow feature.
However nice these features are, these power heads have a poor track record for reliability, they have very poor head pressure, and do not re-start well after the pumps have been in service for a while (in applications such as wave makers).
*Jebaeo & Finnex Pumps
The review of these two brands is quite simple, both are extreme economy brands that are designed for quick cheap sales by discounters, most definitely not quality aquarium stores or online sellers.
I personally know a distributor for these and other Chinese brands and he also will back up this statement. My own use in particular of the Jebaeo pumps (aka Jebo) is that these are far from durable pumps.
The warranty on these lines also speak volumes, with the Jebaeo there is NO warranty. If you purchase a Jebaeo and the seller states there is a warranty, either they are lying or they are self backing the pump (good luck if this business sticks around).
The warranty for the Finnex is 6 months with many exclusions.
Another reason I would recommend against the purchase of these pumps is since these are sold via eBay, Amazon, and other purely "here today, gone tomorrow" discounters, is the harm this does to the hobby and industry. I know for a fact many good top notch local stores, full information retailers, as well as full service distributors/manufacturers are falling by the wayside. The end results may someday be no one to provide good hobby support both directly and indirectly to the hobby. I know this view is shared by many professionals in the industry as well.
The bottom line is to do yourself a favor unless you need something cheap to hold you over until you can purchase a better pump and pass on the purchase of either of these brands of pumps.
Hagen Aqua Clear Power Head
*Hagen Aqua Clear Power Heads; this pump is also over rated by about.com in my extensive experience with them.
I have used more Aqua Clear power heads than ANY other (including the Via Aqua pumps).
When these power heads first came out they were industry leaders in design, however they are of 1980s technology IMO and although they are better than Penguins in reliability and head pressure, they still would stop and not re-start in many of my applications when power was even briefly interrupted, making them a poor choice for wave maker applications.
Aqua Clear power heads also do not handle high organic/debris loads well and need more maintenance than the Rios that about.com incorrectly claimed needed!
Bottom line with Aqua Clear power heads is that they are reasonable “retro” pumps, but certainly NOT the latest in technology!
ZooMed Power Sweep
*ZooMed Power Sweep; even though I sold these in my business (and I generally like ZooMed as a company), I rarely recommended them.
They are basically a gimmicky power head with poor head pressure and low output. They are not real durable and the “sweeping” directional output feature is run by cheap plastic gears that often fail. These pumps do not handle high bio loads well and are best used in small aquariums or better vivariums where not much is asked of them.
Hydor Koralia Propeller Pump
*Hydor Koralia Propeller Pumps;
The Hydor Koralia is among the first besides the over priced Tunze Pumps to market a propeller type design to the aquarium hobby, and Hydor does this at a much better price than Tunze.
The propeller design is an excellent idea for low power consumption, yet high water movement in a surprisingly gentle flow of which it owes its gentle flow pattern to its design. The Hydor Koralia Propeller Pump attaches to an aquarium via a magnet that attaches to the glass from the outside holding the motor unit on the inside to the glass.
This is an excellent pump for Reef Aquariums due to this unique design and flow pattern and a pump many of my friends in the professional aquarium maintenance and design business like for certain applications.
These applications are generally tanks under 80 gallons where this flow design is advantageous for crowded reef aquariums and a strong current is desired without the strong smaller diameter column of water generated by most other mag drive pumps.
These propeller pumps (or better the Seio) are also excellent and reliable for use as wave makers (unlike most power head pumps, that are not designed for this type of application as they have too “heavy” a designed for “on/off” applications)
HOWEVER, this pump is not without its faults and unfortunately there are several.
Here are a few problems as noted by these professionals:
- Low quality design that easily breaks including the impeller if debris (which is easily brought into it) comes in contact with the impeller. Also if the unit falls from the glass, it can break easily.
- High price per actual performance; the Hydor Koralia 1 generally sells for twice what a Via Aqua 1300 sells for of the same performance and quite bluntly has a much less durable design than the VA 1300.
The relatively newer Seio 320 Propeller Pump is a vastly better choice when value is considered
- The magnets can let go and often do in aquariums with 3/8 inch or thicker glass (although this is a rare problem in tanks with ¼ inch glass which is why they are a reasonably good pump choice in tanks under 80 gallons
- In Larger tanks standard power heads such as the Rio 1700 are simply a more durable and better choice.
- When used as a wave maker many report a lot of noise (although many pumps can have this problem).
(6) They are purely water movement pumps and CANNOT be used to run UV Sterilizers, Sumps, or any other application where a pump with a standard outlet that can be hard plumbed or added vinyl tubing is necessary.
Seio Propeller Pump
*Seio (Rio) Propeller Pumps;
The Seio Propeller Aquarium Pumps are finally past the testing phase in aquarium maintenance use where I can make some notes based on the use of many Seio pumps.
Unlike my recently hoped for but disappointed tests with the internal UV Sterilizers (marketed by Jebo/Jebaeo, JBJ, Killing Machine) where I was really hopeful for a new cutting edge product, but let down after use; The Seio Propeller Pumps have passed with the quality I hoped for.
The Seio Propeller Pump is vastly more economical than the Hydor Koralia with a better ceramic design as well as a more compact size. As with most other propeller pumps, the Seio is the best design for use with wave makers.
I would strongly recommend this propeller pump over the Hydor Koralia.
The Seio 320 (320 gph) is best for ¼ inch thick glass, while the Seio 530 produces a flow of 530 gph (2000 LPH) and is recommended glass thickness 3/8" or less.
The Seio 320 is comparable to the Hydor Koralia 1 (actualy slightly more output), but is also almost half the price with a more compact reliable design.
If you in need of a propeller aquarium pump, this is definitely the pump you should consider!
Where to purchase: Seio Propeller Water Circulation Pumps
VorTech Propeller Pump
*VorTech MP40 Propeller Pumps;
This propeller pump has become the latest fad in reef keeping circles, and in part for some good reasons, but unfortunately it also has some serious flaws too.
The VorTech MP40 Propeller Pump in particular has some nice features such as wireless control and battery back up. It is also a well designed pump with many wave and broad flow & flow rate options.
One feature that is touted by many is not a really positive when one examens it in more depth with years of experience using magnetic drive pumps. Unfortunately the magnetically coupled design for driving the impeller in the water from outside the aquarium or pump housing has been tried before.
The magnet required for this feature unfortunately is easily uncoupled from the electromagnetic current from outside the glass, often due to debris in the water. The more common method of using an impeller in a magnetic well certainly has its drawbacks too, but impeller uncoupling from the magnetic current is much less common with this design (the before mentioned manufacturer went back to an impeller well design after too many of their filters ceased functioning because of impeller uncoupling).
This magnetically coupled design is also touted because you have have no risk from electrical malfunction inside the aquarium. However this too is a misguided attribute, as in literally over 1000s of magnetic drive pumps I have used inside the aquarium; when the pump did fail, there NEVER was any disastrous electrical meltdown or similar in part due to the fail safe epoxy design.
Another cool feature is the "VorTech Battery Backup" touted as "reef tank insurance in an aluminum housing". While not a new idea, since I have been using and even designed my own as far back as 1988, this is the feature I like best.
However the jury is still out on this feature as many who have purchased this have had it fail when needed most!
In the end, with the high price, I think this is a cool product that is also "buyer beware" since this well marketed and over hyped product is more of one of those products where you could do better purchasing a more proven propeller pump such as the Seio or Hydor and a Wave-maker to go with it.
As well more proven air powered back up pumps or your own DIY Inverter/RV battery back up system could be designed.
Further Reference for Power Outage Answers:
Aquarium Power Failure, Tank Moving
Where to purchase alternative products:
Hydor Smart Wave-Maker
Non-Stop AC/DC Pumps
Eugene Danner (Supreme) Pond Master Pump
This is a "tried and true" line of light to medium duty primarily pond, but also aquarium sump pumps. These are among the first epoxy filled/electromagnet water circulation pumps, and are still better than many.
I personally have used these for now decades with at least reasonable results, mostly in small pond applications
My only complaint is with the more modern Taam/Rio HF series at a slightly lower cost and with vastly superior head pressure and slightly better reliability, these are simply not a good value.
The newer yet SunSun line, while not as tried and true as either the Pondmaster or Rio HF series, has already proved in about 2 years of use (as of 2013) to be AT LEAST as reliable with equal and better head pressure for a MUCH better price.
Good example of superior head pressure and value pumps are the Rio 32HF and SunSun JAP-8500 pumps
The bottom line is while still a good water pump, the PondMaster is simply obsolete when compared with other newer generation water pumps when value and head pressure are factored in.
Where to purchase:
*Rio 32 HF Medium/Heavy Duty Pond/Sump Pump
*SunSun JAP-8500 Heavy Duty Amphibious Pump for Pond/Aquarium Systems
Via Aqua Power Head/Submersible Pump
*Via Aqua; this is a real workhorse line of pumps that is VERY widely used in the professional aquarium maintenance community yet did not even get mentioned by about.com (go figure!).
Unfortunately Via Aqua has ceased production of the excellent value pump, in part due to the economy, but also due to unethical practices by another company.
These pumps in the power head line (not the basic line) also have ceramic shafts and very durable construction. Via Aqua pumps (along with SunSun) can be used in sumps or as a power head and have excellent head pressure.
The Via Aqua power head line (such as the VA 1300) can be submersed or used in line which adds to versatility that not all pumps can match. For Aquarium sumps (usually in marine applications) the Via Aqua 2600, and 8000 are unsurpassed in usefulness, especially when costs vs. performance is compared.
Again the only con is these pumps can be a little noisy, but only when used in line. Via Aqua power heads (as with SunSun, Rio among others) are also not as adjustable in flows as some other power heads, but this a minor inconvenience IMO. This inconvenience is more than made up for in versatility!
I will also admit to a couple of models by Via Aqua that I not recommend due to less than desirable durability and these are the 2300 and 4900 (the 4900 has failed miserably every test I have performed on them).
Where to purchase:
*Via Aqua 1300; Now SunSun HJ 1542
*Via Aqua 2600; Now SunSun HQB-3500
*Via Aqua 8000; Now Superior SunSun JAP 8500
I have had persons also ask me why many brands such as SunSun, Rio or Via Aqua are not as commonly available as Hagen and does that make them of lower quality as no one really wants them?
The answer is quite simple; Hagen is sold through a larger network of mainline Pet Store distributors (although they are now transitioning to their own in house distribution system). This system promotes an all or nothing approach to marketing their products basically meaning you carry the whole line (good and bad) or not get discounts or even sell anything at all. This marketing system has been very successful (not to mention slick packaging), however this does not mean a better product.
Via Aqua & especially SunSun (among many other high end brands) do not sell through traditional marketing distribution methods and systems, rather it sells many high end Marine fish importers and similar without all the expensive marketing gimmicks.
This in particular places their products in the hands of Aquarium Maintenance Professionals who do not care about slick marketing or whether it is the fad, rather whether it works or not which is why Via Aqua and many other similar high end companies choose to sell this way.
Here are a few more manufactures that sell only (or partly) through high end distributors as well: Sanders, Tropic Marine, Liquid Life, SunSun, SeaChem, SPS, Marc Weiss, Two Little Fishies, AAP Wonder Shells (not to be confused with Weco Wonder Shells sold at Amazon & elsewhere) and many more.
If no stores in your area sell Rio (Taam), Seio, SunSun, Tropic Marine or similar it is that they choose to buy from the one size fits all mainline distributors that also are the primary stockers of stores such as PetCo as well.
Other Recommended Reference/Product Sites
Freshwater Aquarium Basics
Marine Aquarium; Basics to Advanced
The Internets most researched and up to date Aquarium Light Information
FISH AS PETS
Fish as Pets with articles & commentary of Interest to the Aquarium Hobby
Aquarium & Pond Plumbing Parts
Unique and often difficult to locate parts to help plumb your aquarium or pond system.
This includes diverter valves, back flow check valves, couplings and more
UV Replacement Lamps/Bulbs
For TRUE High Output, Hot Cathode, Low Pressure UVC Germicidal Bulbs, not the low output medium pressure bulbs commonly sold at Amazon or eBay
The best in Quartz, Under gravel, and Titanium Submersible Heaters:
As well I recently read a review on a Reef forum (thereeftank.com) as to Via Aqua pumps and while I will admit my reviews are based on observations (making them more subjective), these reviews are based on real world applications, where I often switched between different pumps to find the best pump for the application. What was sad about the reviews on this forum was that these were not based on any knowledge of what a pump is designed for.
Although I will agree as to their positive reviews of a Maxi Jet for wave makers, even here based on my tests a Propeller pump such as the Hydor Koralia Propeller Pumps or better the Seio Propeller Aquarium Pumps are still a better choice than the Maxi Jet for wave makers.
In their review they compared the Via Aqua 1300 to the Maxi Jet for wave makers, which the design of the Via Aqua 1300 is not even intended for, as with any pump that is designed to not only to move water, but to “lift” water (head pressure), the VA 1300 is a poor choice for wave makers (kind of like comparing Toyota Camary to a Ford F350 for hauling loads and then bashing the Camary for failing in this task). However as a power head/water pump this pump (VA 1300) is one the most reliable pumps with better head pressure than the Maxi Jet; years of use in my aquarium & pond maintenance company prove this as well as a friends that own a fountain building company that use this and another Via Aqua Pump (Via Aqua 305) for their fountains since they rarely have problems and their customers are quite happy.
Also in this review they bashed the Via Aqua 4900 and used this pump as one more example not to trust Via Aqua pumps, sadly if they read this review or talked to many others in the industry they would know that the VA 4900 is a lemon and you cannot rate Via Aqua pumps based on this bad pump or ridiculously unfair comparisons of a VA 1300 in tasks it was not designed for.