I found something called a phosphate sponge, and it is supposed to clear up algae from your water. It a big flat piece of sponge that you cut and fit into your filter. Has anyone used this before, or heard anything about them? I got it cause my waters getting nasty and green. Also to help clear up my water and get some more airation i got a powerhead with a filter, and it has a air tube that you can adjust and get air bubbles blowing into the water along with the jet stream. it seems pretty good, just put it on today. Im also covering the fish tank with towels to keep out all light. And i know its not the best idea, im not a fan of using chemicals, but im getting desperate to get some clear looking water again, so i got some stuff called algae eater. Anyone used this stuff before? Hopefully all of this will result in algae free water pretty soon.