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Re: Air Driven Sponge FIlter For Planted Tanks

Finally a reason to keep the manufacturers making air pumps for the
aquarium hobby market . . . ;-)

But seriously, if you stop the water flow for, say, 12-14 hours per
day, wouldn't that be long enough to kill off a lot of the bio culture.
  If so, then why do it?  If not, then why would you need the waterflow
at all?  And is 10-12 hours long enough to rebuild the culture *and*
provide a usefully long denitrification period?

Many folks worry about power outages knocking down their bio-culture in
a few hours.  Just how long does a bio-culture survive without fresh

Scott H.

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