Tropical Science Labs ATCCC400 Complete Care Water Conditioner, 145-Ounce One-Step Water Conditioner - with natural slime coat Always shake container before use When adding new fish always add 1 teaspoon per 20 gallons of water One-Step Water Conditioner-with natural slime coat Always shake container before use When adding new fish always add 1 teaspoon per 20 gallons of water One-Step Water Conditioner-with natural slime coat