Zeolite - Seachem

How to use: rinse ZeoliteTM before use. Place it so that the water flow through it is maximum. Use 250 ml (about 1 cup) of ZeoliteTM for 200 liters of aquarium water. If you have a smaller aquarium, use 5 ml of ZeoliteTM in 4 liters of aquarium water. The specified quantity can remove up to 0.5 mg/L of ammonia. After about 24-48 hours, ammonia levels should go down to zero. In this case, you can remove ZeoliteTM and replace it with activated carbon. To eliminate heavy metals, ZeoliteTM must remain in service and be replaced monthly