Copper Sulphate Crystals is an inorganic compound which is used to kill algae, fungi and bacteria. These are formed in a bright blue colour as they contain water molecules inside theircrystalstructure. Moreover, provided crystals are easy to keep in an air sealed container tor retains its quality. Copper Sulphate Crystals are suitable for both agriculture and non-agricultural settings. These crystals are also useful in swimming pools as an algaecide and treat aquarium fish for parasitic infections.