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Shake well. For best results, remove activated carbon during treatment.
As a disease or wound treatment: Add 1 tsp for every 50 U.S. gallons of pond water. Repeat application daily for 7 days. After 7 days, make a 25% water change. Treatment may be continued, if necessary. Double this dose when treating advanced or chronic infection.
As a preventative when introducing new fish to the pond: Dose daily for 3 days.