BALANCE BLOCKS™ & BALANCE BRICKS™ stabilize pH levels of salt water and reef aquariums to match those of the ocean. Balance Blocks™ slowly dissolve, releasing calcium and 71 vital trace minerals for use by fish and other organisms present in reef aquariums. Tests have shown that aquariums have improved development, health, and vitality with the addition of Balance Blocks™ and Balance Bricks™. 

2 pack, 15 pack and large block

Your marine tank will get the complete chemical balancing it needs!