Immediately neutralizes toxic chlorine-2 fl. oz. bottle-water conditioners-fresh water.for aquarium use only.marchlor is not a medication and should not be used as such.use 2 drops per gallon of tap water.marchlor should be used when setting up tank.

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Use 2 drops of marchlor per gallon of tap water.treat new tanks replacement water & water used to transport or transfer fish.marchlor should be used when setting up changing or adding water to an aquarium it does not upset biololical filtration bal.
20 ounces
Sodium thiosulfate

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