Choose the size best suited for your system: 120ml bottle treats 240 gallons (908 liters) 240ml bottle treats 480 gallons (1,817 liters)
Chelating agent to detoxify heavy metals Vitamins to fight lateral line erosion Great additive to freshwater dips of marine fish
First Defense was developed to help fish adapt to new environments by assisting the fishes' natural immune system.
DO NOT use a full dose of eco-balance or waste-away on the same day as using First Defense
Changing the environment of a fish causes stress that robs fish of essential nutrients and can weaken their immune system. First Defense is scientifically designed to provide stress relief and support the immune system, helping fish cope with stress due to bagging and shipping from the store to your tank, water changes, new fish additions, disease treatments, and other environmental changes.
