Magic Clear 500ml. Blue Planet Crystal Clear is formulated to clear hazy water and remove suspended particles from freshwater aquariums, bowls and ponds. Crystal Clear bonds with these particles, making them heavier, the particles will then settle, leaving a ?crystal clear? aquarium. Cloudy water is generally caused through excessive feeding, poor filtration, or potentially the fish have now grown larger and the current environment may not be entirely suitable. If constantly using Blue Planet Crystal Clear, please assess the environment and what is being added to ensure you are offering the right conditions for your fish.