TO THIS AMOUNT OF WATER ADD THIS AMOUNT OF 3% HYDROGEN PEROXIDE --OR-- ADD THIS AMOUNT OF 35% HYDROGEN PEROXIDE 1 cup 1 and 1/2 teaspoons 7 to 10 drops 1 quart 2 tablespoons 1/2 teaspoon 1 gallon 1/2 cup 2 teaspoons 5 gallons 2 and 1/2 cups 3 tablespoons plus 1 teaspoon 10 gallons 5 cups 6 tablespoons plus 2 teaspoons 20 gallons 10 cups 3/4 cup plus 1 tablespoon plus 1 teaspoon