Dr. Tim's Aquatics First Defense Fish Stress Relief & Immune Support for Freshwater Aquarium Size:4 fl oz UVA light promotes basking and

UVA light promotes basking and feeding behavior

providing you with long-lasting illumination without frequent replacements

ensuring it can withstand vigorous play

Nylabone® treats come in a single

Dr. Tim's Aquatics First Defense Fish Stress Relief & Immune Support for Freshwater Aquarium Size:4 fl oz UVA light promotes basking andChanging the environment of a fish causes stress that robs the 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.