I would still want a bio filter. I would also want a mechanical filter as well. I think running a sump and using something like this new self-cleaning idea to save me a trip down into the tank for snaking is plausible. I had thought that instead of a single screen across members, Something would have to be done to make the water flow across the whole bottom and make all waste exit. I had thought using members that were setup like blinds would work. Keep them open so waste falls through and then shut them so water has to flow under all of them from the far end of the members to the exit tube. I might be able to scribble this Saturday when I'm off work.