What Do You Use to Disinfect Fish Tanks?

Because fish tanks do not have the constant movement of a river or the ocean, it is possible that bacteria and disease can quickly take over your tank and infect your fish. When this occurs, depending on how severe the infestation is, your tank may need to be disinfected to prevent your fish from developing disease or dying. You can disinfect your tank in several ways.

  1. Bleach Solution

    • A solution of 1 part bleach to 20 parts warm water can help kill any residual bacteria or disease in your fish tank. Place the solution in a spray bottle, and spray liberally on every interior surface of the tank. Wipe with a clean rag, and then rinse the tank thoroughly to remove any remaining bleach. Let the tank completely dry before reusing it.

    Methlyne Blue

    • Methlyne blue may also be used to disinfect a tank without having to remove its entire contents. You must remove the fish. American Aquarium Products recommends using 1 tsp. of a 2.303 percent solution of the product for every 5 gallons of tank water. Methlyne blue works on bacteria and parasites by interfering with the oxidation-reduction processes. Methlyne blue is available in most fish sections of your local pet or aquarium store.

    Drying

    • Letting your tank dry and sit for six or seven days in a dry location may also help disinfect your tank. Most fish tank bacteria thrive in a liquid or moist environment. Removing moisture can cause these bacteria and other organisms to dry up and die. Thoroughly rinse and scrub the tank out with water first before letting air-dry.

    Commercial Product

    • If you are concerned about the specific effects of a disinfectant product on your fish, several commercial fish tank disinfectants are available through most pet or aquarium stores. Follow the directions carefully on the bottle to ensure proper safety and results.