Ok whilst this topic is still going off like a firecracker, may I ask somebody, firstly, (Aqua one 1200) Is the water coming into my canister through the holes in each media cartridge, sealed by o rings? Because i can see bits of crap floating around down the bottom, I assume the water then gets sucked back up through the media and back out.
Also why are bits off poop and whatnot creeping up the sides of the media instead of through it? Its as tight a fit as you can get it.
Also I keep getting air in the canister, I can remove it be slowly rocking it, and keeping the outlet out of the water, however it just gets more air pockets in it! Could this be because the intake is near airstones? I cannot see any bubbles going up however im guessing the air particles in the water invisible to the naked eye are building up inside the canister. Am i right, and apart from the odd noise, is air in the canister something I should be worried about?