Lolz, Mad mad props Y0!!!!

I hate to be “that dummy” (even though I am), but even clicking on the link, I don’t quite understand the features of this pump…could someone just explain them really broadly in laymen’s (dummy) terms. Sorry about that-it looks really interesting, but I don’t think I quite get it. Thanks and sorry for being “slow”.

These appear to be geared towards the Computer over-clocking crowd who require liquid cooling to prevent CPU meltdowns at higher frequencies…

Nonsense if you ask me… The PC Over-clocker crowd never uses the extra computing power for anything constructive. They just tinker non-stop.

-TDF

I already asked eheim directly if they ever planned on a DC line for aquariums… in short: no. I have one of those pumps though, since my computer is liquid cooled (I have the innovatek version though, not the aquacomputer shown above). The only problem I see is that these pumps are designed to work off of the 12v DC plugs that your computer power supply gives you. An aquarium version would require a AC/DC power supply of good quality, which would most likely add to cost if it was made efficient.

The main advantage of these pumps for computers is that they are higher pressure than the usual 1048 bodies they are based on. Their flow however, is kept rather low, so I recently replaced the DC pump with a regular 1250 because I started watercooling my graphics card as well.

The only question I have about eheim making a ‘full range’ of DC motors is ‘why?’. What would it be for anyways? The variable speed is the major reason for DC pumps, so adjustability and wave making are the main reasons, right? Well… since when do you use an eheim for wavemaking? And if you wanted to ‘adjust the speed’ for some reason, like when used with a protein skimmer, then wouldnt you just get one of the eheims that is a more suitable match as far as size goes? If eheim came out with a prop based flow pump, that would change things, but otherwise… these eheim DC pumps cost about 2x as much as their AC counterparts. A DC version of the 1262 that costs $300-400 really wouldnt sell that well… besides, the ‘computer’ versions dont go much higher in speed compared to the AC versions. One of the main reasons for DC is that you aren’t limited to the usual 1800rpm speed… not so much the case here.

@Nick, DC pumps allow easy control over the flow via RPM adjustments. Depending on the type of motor they can also be more efficient than AC designs.

@Jon, the letter was a sarcastic response highlighting the technological developments of Eheim. It was not meant to convince Eheim into producing these pumps; for their business model it just does not make sense.

Why would I want a full range of DC motors? Variable speed return pump and closed loop. I am hopeful this will happen in the future, but I do not believe it will be from Eheim.

these people make these eheim pumps:

http://www.mondside.com/eheim.html

I was thinking of using an irrigation timer with my aquariums but now I am looking to use the aquacomputer and adapt it to a used dc treadmill motor (3800 rpm, 2.5hp) with an above ground pool pump attached for my frequent water changes…. along with a bunch of low pressure solenoid valves. I think I might be able to use the fan speed inputs with flow sensors for the filters between changes…. I am thinking of adapting the voltage since that seems easier and less costly than adapting for the a/c controller used on the eheim… I might be able to use an old stereo amplifier? maybe.. I still have a bunch to learn though…. I might go with an ac motor if that is better but I am a bit confused as to why I am pushed that direction by the market… why go with a complex ac controller and an inefficient motor which has hard to control non-linear torque?

I believe the eheim pump above is an A/C synchronous permanent magnet motor… i suppose its single phase.. the aquacomputer uses Pulse width modulation to adjust the freq of the a/c signal

I just ran across some 1200 gph 12v dc bilge pumps (~$30) being sold from a boating site… 42watts.. I believe the aquacomputer with power booster does 45w…

another source for dc motors are electric scooters…. and many appliances have variable motors like power tools and washing machines, fans, etc…

I guest this pump is not too tough, All pool and spa parts are here to solve your problem in your pool.

Well it look's like sturdy, i think it phone to rust.

Well it look’s like sturdy, i think it phone to rust.

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