Sera Siporax Pond 50L

Sera Siporax Pond Professional biological filter media is suitable for use in most pond and some aquarium filters. This high-performance media maximizes the surface available for biological purification and provides the optimal substrate for the settling of necessary filter bacteria. 1 litre Sera Siporax Pond provides as much settling area for bacteria as approximately 34 litres of clay filter material. Available in 10L, and 50L packs.