I agree, I will be taking out the cocofibre and using just moss. Even though I have moss as a top layer over the cocofibre, it is making the water dirty up a bit, so I will change it along with the water to get it clean again, or atleast cleaner. It is not too bad though. Eggcrate was cheap (not sure pricing on hydroballs) and easy to do, and easy to build a background with if you want to make ledges, and other things.