Betta Basics, 2 L / 67.6 fl. oz. Designed to provide optimal environment for both Betta and plants Removes any chlorine, chloramine, and ammonia Buffers water to a pH of 7 and provides a healthy environment for fish and plant 5 milliliters treats 1 1/2 US quarts with plants present In betta only bowls without plants, 5 milliliters treats 1 US gallon