I use both in my sump and notice that the scrubbies clog where as the bioballs don't. Amonia and nitrites are zero.FSM;1736062; said:Also, why use bioballs? They have 1/2-1/3 the surface area of pot scrubbies.
My sump uses a drip tray and I put the blue filter floss (just like the stuff used in a canister) over it. It removes the large waste but doesn't polish the water. I need to find a simple way to polish the water so that i can remove my HOT filter.