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Re: [APD] Re: Aquatic-Plants Digest, Vol 13, Issue 27

Yes, so long as you are throttling it down on the output
side and not the intake side. The kind of pump in that
filter, and most aquarium canister filters, is a simple
permanent magnet rotor, AC motor with a centrifugal pump on
the end. If you restrict the water flow on the output side,
it won't hurt the motor or the pump. If you turn it down to
*next to nothing*, the motor might overheat, but I doubt
it. Otherwise, no problem.

IF you throttle it down on the intake side, you might cause
bubbles in the pump chamber (cavitation) which will be very
noisy and cause the moving part, the rotor to wear

Once the filter has been up and running for whil, the
accumulation of biofilm in the tubes and detritus inthe
mdeia will unavoidably slow down the water flow. So you
might want to turn the valve open a bit more when it starts
to slow down.

If too much detritus collects inthe media, it's the same as
closing down a valve on the intake side, so you'll start to
hear bubbles collecting inthe filter faster than the eheim
can burp them out. You might think it is sucking in air
directly from outside the filter, but it's sucking the air
from the water -- then it's well past time to rinse,
refresh, replace the media ;-)

Scott H.
--- Randy Pullen <RPullen at waterpik_com> wrote:

> I have the 2026 also and turned down the flow rate
> perhaps to 50% is
> that an acceptable thing to do?
> Thanks,

Plant your feet in Washington, D.C. and touch the moon -- at the National Air & Space Museum. 
And learn the art of aquascaping Senske style at AGA2K4. 

Speakers, field trip, Ray "Kingfish" Lucas, and more. . .
The Annual AGA Convention, 2004, November 12-14.

Convention Details/Registration at aquatic-gardeners.org & gwapa.org
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