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 Fri Aug 28, 2009 2:53 pm GMT Reply
I have a homemade sump on my 90 gal tank and have a couple of quick questions. First of all let me say that the system has been running for about 6 months and is working good.
First Question: There is a good amount of sediment that collects in the bottom of the sump (better than in the display tank) just curious if this is normal or do I need more filter floss in place? along the same token should I put some sort of substrate in the bottom?
Second Question: I've always been told that you don't want your bio-media completely submerged, that they need air to allow the bacterias to colonize. Wondering if this is true or not?
Here is a pic of the sump, not running obviously, filter floss usually sits on top of the bio-media. Thinking of redesigning is the reason for the questions.
Brief description: I have an overflow box, water comes down flows through the floss and bio-balls, flows to the right over the pieces of plexi-glass into the pump area and is pumped back into the tank.
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