Hagen Bio-Max Insert for AquaClear 70/300

AquaClear 70 BioMax Filter Insert provides an optimal environment for beneficial bacteria growth. Reducing ammonia and nitrite levels, it increases biological filtration efficiency by 30%. Exclusively designed for the AquaClear 70 Power Filter, the insert is safe for fresh and saltwater aquariums. Net Weight: 6.8 oz (195 g).