pH DOWN and pH UP. Both products are fast acting, colourless, easy to use and will not cloud or colour aquarium water. Product raises ph level until it reaches the recommended level for the species of fish. A ph level of 7.0, neutral, is recommended for community aquariums of more than one species. Contains No Phosphates. Safe For Use With Live Plants. For Freshwater Aquariums Only.: Size: 16 oz.