The pH of an aquarium is a very important yet commonly overlooked aquarium water parameter. Maintaining a balanced and stable pH is vital to the health of aquarium livestock and efficiency of the bio-filter. Fritz Aquatics pH products are concentrated; safe and easy-to-use formulations that adjust and maintain the correct pH for both freshwater and saltwater aquariums. With Fritz pH Higher the pH may be increased to a desired level for aquarium inhabitants. FR80359 Casebuy:12.