Unique balanced formulation of essential physiological salts promotes fish health, all year round. Improves water quality with its built in pH buffer which guards against potentially damaging swings in pH. Helps fish to maintain a stable internal salt and fluid balance which is essential for fish health. Helps minimize stress in fish and act as a supportive treatment when treating disease. Reduces toxicity of nitrite - a toxic fish waste which can build up in the pond 2.27 kg treats ,273 lites (500 galls)