Dual Action Stress Zyme - 4 ounce

4oz (120 ml) bottle. Treats up to 240 US gallons (908 L). Stress Zyme is a biological filter additive containing live bacteria that improves the development of the biological filter and helps clean a dirty aquarium. Use when setting up and maintaining an aquarium. Contains over 300 million live bacteria per teaspoonful. Breaks down organic compounds that cause dangerous conditions such as ammonia and nitrite poisoning and low oxygen levels. Continuous use assures an active biological filter, cleaner aquarium, healthier fish and good water quality.

Stress Zyme can be used with freshwater tropical fish, marine fish, invertebrates and coldwater species including koi and goldfish. Stress Zyme will not harm aquatic plants. Stress Zyme has a five-year shelf life and does not require refrigeration. Keep from freezing. Do not store above 120F (49C). Stress Zyme is completely harmless to humans and pets.

Directions: Shake well before using. New Aquariums: On the 1st, 7th, and 14th days add 2 teaspoonfuls (10 ml) for every 10 US 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 (40L) of aquarium water weekly.