Choose the size best suited for your system:
2 oz bottle treats 120 gallons (454 liters)
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)
Helps promote healing after coral fragging
Safe for corals and other invertebrates
First Defense was developed to help hard and soft corals adapt to new environments by removing environmental stressors.
Changing the environment of a coral causes stress that can weaken their immune system and lead to disease. First Defense is scientifically designed to provide stress relief and support the immune system, helping corals cope with stress due to bagging and shipping from the store to your tank, water changes, disease treatments, and other environmental changes.
Directions: Shake well before using.
Dosage: Add 5 ml per 10 gallons of aquarium water.