AQUA MEDIC BACTOBALLS 5 L

"BactoBalls 5 l bucket (c. 1.3 gal) BactoBalls are the optimum filter medium for biological filters. They can be used in trickle filters and denitrification reactors and in larger aquaculture systems. The large surface area of 300 m2 / m3 allows a high concentration of active bacterial biomass."