BACTOSAN eliminates biological cloudiness caused by overfeeding of fish. Preparation intended for eliminating the cloudiness of water caused by poor filtration or overfeeding of fish. Cloudiness is also a common phenomenon in new tanks, where biological equilibrium has not yet been established. BACTOSAN quickly and effectively restores clarity, which improves living conditions and aesthetics of the tank. When used in breeding tanks, it increases the egg survival rate and hatch rate of delicate fish. After the elimination of biological cloudiness it is recommended to use BACTO-ACTIVE. If biological cloudiness occurs again, check the efficiency of the filtration system, the quantity of provided food, density of population and the frequency of water changes. If the problem recurs frequently, it means the biological equilibrium of tank is not established.