Contains one (1) API POND AQUA ESSENTIAL Pond Water Conditioner 976ml Bottle WORKS INSTANTLY: Highly concentrated pond treatment works instantly to remove harmful chemicals, making tap water safe for fish; Reduces the risk of fish loss when starting or maintaining a pond DECHLORINATOR: Removes chlorine, chloramines, heavy metals which are found in tap water and can cause gill and tissue damage, breathing difficulty, stress and fish death AMMONIA REMOVER: Removes the toxic ammonia continually released by fish through their gills, urine and solid waste. Uneaten food and decaying organic matter also add ammonia. Small amounts of ammonia stress fish; large amounts of ammonia will kill fish NITRITES AND NITRATES REMOVER: Produced by fish waste and uneaten fish food, nitrites inhibit respiration and suppress the immune system at low levels, while high levels cause suffocation; Nitrates can be harmful to fish and lead to algae growth