DrTim's First Defense was developed to help fish adapt to new environments by assisting the fishes' natural immune system.
Environmental Changes Cause Fish Stress
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.
Choose the size best suited for your system:
- 4oz bottle treats 240 gallons (908 liters)
- 8 oz bottle treats 480 gallons (1,817 liters)
- 16 oz bottle treats 960 gallons (3,634 liters)
- 32 oz bottle treats 1,920 gallons (7,268 liters)
- 64 oz bottle treats 3,840 gallons (14,534 liters)
- 128 oz bottle treats 7,680 gallons (29,069 liters)