Thanks Kurt. Poe rests in the strangest places, including underneath, on top of, and inbetween the filters. Does a lot of swimming and eats pretty much every bit of flake food I have put into the water; doesn't seem as keen on the boiled lettuce and spinach though. I never used an air stone with my fish, so I think, for the time being, I will leave it out. Water appears clearer today though Poe has already had two feedings.