API Prevent Algae prevents algae from building up in your aquarium. By helping to remove phosphates – a nutrient for algae – green water, slime and hair algae are all reduced. The 237ml solution is fast acting and contains a unique blend of ingredients courtesy of experts at API.Prevent Algae from API has been scientifically proven to remove phosphate and silicate, common nutrients found in fresh and saltwater aquariums whilst promoting the growth of reef building coral tanks.API Prevent Algae also helps to reduce the maintenance, the time and the up-keep of your aquarium in a better, cleaner condition. Safe for all aquarium inhabitants, including fish, plants, corals and invertebrates, API Prevent Algae is the number one choice for effective algae control in aquariums. The solution is also suitable for use in both freshwater and saltwater aquariums.Directions: To dose the aquarium add 5ml per 40 litres of aquarium water.API Prevent Algae: