Reduce aquarium maintenance by creating a naturally balanced aquarium with API Stress Zyme. This freshwater and saltwater cleaning solution contains over 300 million live bacteria per teaspoonful to consume sludge and organic debris, keeping gravel and glass clean naturally.

Key Features

Standard Dosage: Add 1 tsp. (5 ml) per 10 US gallons (38 L) of water, once a week.
New Aquariums: Double the dose at start-up and continue for 2 additional weeks.
Storage: Has a 5-year shelf life and does not require refrigeration.

Sludge Removal: Consumes fish waste, uneaten food and other organic compounds that cloud water and coat surfaces.
Toxin Prevention: Helps prevent harmful ammonia and nitrite buildup as waste breaks down.
Biological Filter Boost: Strengthens and speeds up the natural aquarium cycle.
Freshwater & Saltwater: Safe to use in both types of aquariums, even with fish in the tank.