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Dr Tim’s FIRST DEFENSE Stress relief and Immune Support


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16oz 480ml
4oz 120ml
8oz 240ml

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First Defense Stress Relief for Reef and Nano Aquaria
Promote Healing • Repair Wounds  


First Defense was developed to help fish adapt to new environments by assisting the fishes’ natural immune system.

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.

First Defense is great to use after fragging as it promotes the quick healing of the coral tissue First Defense Stress Relief for Reef and Nano Aquaria
Promote Healing • Repair Wounds Fish are subject to many stressful events before becoming comfortable in your aquarium. For instance, they were shipped in bags to the store and then chased around the tank, netted and bagged before you took them home. Many times fish are not fed much before shipping so that their waste does not pollute the shipping bag but this can further weaken their immune system.

As with people, a weakened immune system means a greater chance of the fish become sick with Ich or a bacterial infection. The mixture of immunostimulants and vitamins in First Defense have been demonstrated to help support the immune system of fish so they can fight off diseases.

First Defense also contains buffers to help maintain the water pH. Further, First Defense detoxifies heavy metals and removes chlorine and chloramines.


Dosing: Add 5 ml of First Defense per 10 gallons of aquarium water.
First Defense cannot be overdosed but adding large amounts may cause your protein skimmer to foam excessively.

How to use: Add First Defense to your aquarium water when setting-up a new tank, adding new fish or after partial water changes. While First Defense is not a medication or disease treatment it can be helpful to fish that are currently being treated for diseases by other means.



Additional information

Weight0.100 kg

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