Siporax Mini, 500 ml

Biologically self-cleaning high-performance filter medium Open-pored, three-dimensional tunnel or pore structure Only 1 litre of Siporax has 270 m2 of surface area for bacteria (to comparison: 34 litres of ceramic are required for the same area) Can be used in fast, slow and trickle filters as well as in all indoor and outdoor filters Quickly effective - in fresh and sea water