The API Pond Care PH Up slowly raise the pH of aquarium water (making it more alkaline) without harming delicate  fish or aquatic plants. Slowly neutralises acidic substances that cause low pH (pH of water is affected by excess food and decomposing waste). A low pH limits the ability of aquatic plants to absorb necessary nutrients. Contains no algae-promoting phosphates.
Slowly raises the pH of aquarium water.
Safe to use around pond fish or aquatic plants.
Contains no algae-promoting phosphates.