Description
Bio Balls are used for biological filtration. The main advantage of bio balls over other biological media is that the surfaces are impossible to clog up (when used with a prefilter) compared to the micropores of porus ceremic material. The reason is simple: the gabs of space within a bioball is large and anything that can clog it up would already have been filtered by the prefilter (such as filter wool, sponge etc). This is the reason why water filteration should always pass through mechanical filteration (prefilter) before biological filteration.
