sera Siporax Pond 24.2lb | High-Efficiency Biological Filter Medium | Nitrate Reduction & Optimal Bacteria Habitat | Easy Maintenance & Setup | Ideal for Garden Ponds

1 liter (1 us quart) Sera siporax pond provides as much settling area for bacteria as, approximately 34 liters (9 US gal.) of clay filter material. Pre-filter with Sera biofibres coarse to prevent large particles from entering the bio filter. Sera siporax pond provides bacteria an extremely large amount of open-pored tunnel structures. This allows an ideal supply of the bacteria with nutrients and a smallest amount of fresh water. There are oxygen-poor conditions within the tunnels. This makes the bacteria crack nitrate to get enough oxygen. Consequently, they continuously break down nitrate, and the pond water remains low in nitrate. The surface of one liter (One US quart) of Sera siporax Professional has almost as much biological breakdown power as 34 liters (9 US gal.) of clay filter material. Calculation formula for Sera siporax pond: one single liter (One US quart) Sera siporax pond is sufficient for purification of 1, 000 liters (264 US gal.) pond water with 20 pond fish of 10 cm (4 in.) Length each or a comparable stock ［representing approx. 1.5 kg (3.3 lb.) of fish fed with up to 40 g (1.4 oz.) high Quality food per day] and release it from organic pollutions in long terms.

• HIGH-EFFICIENCY BIOLOGICAL FILTER MEDIUM: Maximizes pond clarity & nitrification with unique tunnel structure design for optimal bacteria nutrient absorption.
• NITRATE REDUCTION FOR HEALTHY PONDS: Advanced oxygen-poor tunnels inside encourage bacteria to reduce nitrate, keeping pond water low in nitrate.
• MAINTENANCE-FREE & LONG-LASTING: Designed for all garden pond filters, this 50L pack effectively cleans up to 50,000L of water with 1000 fish (each 4 inch), minimizing maintenance efforts.
• OPTIMAL BACTERIA HABITAT: Offers bacteria vast open-pore tunnel structures for superior water and nutrient flow, significantly outperforming traditional filter materials.
• EASY SETUP WITH PRE-FILTER OPTION: Use with sera biofibres for enhanced performance, preventing coarse pollutants and extending the life of the siporax pond filter medium.