I agree. I have found that filter sponges and biowheels do it as well.melosu58 said:I suggest you use LR rubble instead. I have bio balls in my fuge and I`m getting ready to replace them with LR rubble. Bio balls are linked to high nitrates but can be kept in check if you do frequent PWC`s.
squawkbert said:Cheap nylon pot scrubbers!!! (remove the little metal rings that hold 'em together).
You bet. I purchased a second HOB nano filter from Red Sea for my pico just to put a few small chunks of LR rubble in it. It all makes a difference.Even if its a small amount?