For filter start-up, after filter cleaning or therapeutic treatment: granules carrying bacterial cultures for quick activation of pond filters.Swell the granules with the bacteria concentrate with a little water and distribute on the surface of the pond filter media.Healthy pond water: fast filter start-up (a few days) and extended pond filter life.no risk to fish or plants, ecological balance: ammonium, ammonia, nitrite and nitrate are degraded.Contents: depolluting bacteria fixed on granules. Dosage: 250 g of granules per 10,000 liters of pond water.