Blue Planet Neutraliser Block releases buffering agents to help balance and maintain a neutral pH, when your water is acidic. The block will also add beneficial minerals and salts for plant and aquarium health. 
Suitable for freshwater aquariums only. 
Size: 20g.
Directions
Place the Neutraliser Block into your aquarium. The block will slowly dissolve over several days. If the block lasts less than 4 days, check your pH as your water might be too acidic. If your water is too acidic, add pH up powder to your aquarium to bring your pH closer to neutral.