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Treat water when setting up a new aquarium and with monthly partial water changes or evaporation replacement. Add 2 teaspoons (10 mL) for every 10 gallons (38 Liters) of aquarium water. Make sure that replacement water is the same temperature as water in aquarium.
Use Tetra AquaSafe every monthly. Add 2 teaspoons for every 10 gallons of aquarium water.