Tetra Correct pH Tablets - 24 Tablets Total (3 Packs with 8 Tablets per Pack) 24 Tablets Total (3 Packs with 8 Tablets per Pack) Tetra Correct pH Tablets Maintains neutral pH in community aquariums Maintaining the proper pH of aquarium water is important to healthy fish Changes in pH can be caused by the breakdown of waste or local tap water with low pH or low alkalinity