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[APD] Filter versus Pump
My Fluval 304 filter stopped sometime last night. I was able to get it
started again, but it set me to thinking that maybe I ought to get a
backup...or maybe a replacement.
I used to think I had to have the filter for the bacteria. But, then I read
on the APD that every surface in the tank is a biological filter. So, over
time, I've gradually removed all the elements that make it a filter, i.e.
the little ceramic tubes, the various baskets for media, and even the four
sponge filters. The only mechanical filtration now is a little sponge sock
over the outgoing water strainer in the tank.
So what I have left is really just a pump. It pushes water through the
heater module and the CO2 mixing jar, and provides circulation for the water
in the tank. (You can see a picture of the setup at
http://www.fitchfamily.com/Equipment.jpg Just ignore the kitchen disposal,
etc.) Otherwise, it's just a collector of brown, stringy stuff that settles
in the bottom. Scott Hieber said he thought that was just sloughed off
Now I'm wondering why I couldn't replace the cannister with a simple pump or
powerhead. The Fluval is rated at 260 g.p.h., and I find pumps that provide
more flow than that at a quarter the price of a new Fluval.
Would this be a practical or advisable solution? If so, would someone
please recommend a reliable and *quiet* pump. Thanks in advance.
John T. Fitch
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