API Stress Zyme contains over 300 million live bacteria per teaspoonful to consume sludge and reduce aquarium maintenance, keeping your aquarium clean and improving the natural aquarium cycle. Making Stress Zyme part of your tank’s regular upkeep routine assures an active biological filter, a cleaner aquarium, healthier fish, and good water quality. This product may be used in both fresh and saltwater aquariums.

Package Description: 8 fl. oz. (237 ml)

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Ingredients: A biological filter additive additive containing live bacteria that improves the development of the biological filter and helps keep a naturally balanced aquarium.

Shake well before using.

New Aquariums: On the 1st, 7th, and 14th days add 2 teaspoonfuls (10 ml) for every 10 U.S. gallons (40 L) of aquarium water. Thereafter, each week add 1 teaspoonful (5 ml) for every 10 gallons (40 L) of aquarium water.

Existing Aquariums: To maintain good water quality and healthy biological filtration, add 1 teaspoonful (5 ml) for every 10 U.S. gallons (40 L) of aquarium water weekly.

• Shake well before using.
• This product has a 5-year shelf life.
• Does not require refrigeration; keep from freezing.
• Do not store above 120°F (49°C).