Aquavitro Shrimp pHa is part one of a two-part water treatment system that helps to replicate the water chemistry of the natural habitats of freshwater shrimp by buffering water to the natural pH for each specific type of shrimp. When used according to directions, shrimp pHa helps to maintain the proper pH parameters of freshwater shrimp while supporting freshwater plant growth and softening water. Shrimp pHa is made from a unique buffer system, which is extremely stable and does not add sodium (which can damage freshwater plants in aquariums). Shrimp pHa can also be used alone to lower pH. Comes in a 350 ml bottle.