A Complete Eco-System in a Bottle For SALT & FRESH WATER Features and other benefits: Dramatically reduces need for water changes Reduces the frequency of cleaning Good for salt and freshwater fish Chemical free! A new tank starter for biological cycling and boosting An organic waste degrader Naturally stimulates plant growth Lowers ammonia levels and biologically reduces nitrates Removes odors and clears cloudy water Biological maintainer for established tanks Enhances ability of plants to utilize light, water and nutrients Breaks down residue on gravel, plants ,rocks, etc. Breaks down protein foam These bacteria are compatible with biological filters and UV lights. The UV lights should be turned off for 48-72 hours after the introduction of this product. This will allow the bacteria to progress through their most active growth stage.