Dubby
His legend will never die
In my experience debris means dead matter... I had this same problem and I did some hard gardening, thinning out the old growth. Thats put a stop to the debris. Otherwise my filters used to get clogged every week with this brown powdery stuff and every time one of my fish went near the bottom of the tank it would stir up loads of powdery muckhoundour said:I also have LOADS of debris. It's so annoying. I just 'hoovered' it up on saturday and by the evening it was back again. I don't think my corys help! They just keep digging into the sand and their fins stir up the debris!! They seem to love it though.