Description
API Marine Stress Zyme 473ml
API Marine Stress Zyme is a biological filter booster formulated specifically for marine and reef aquariums. Containing a high-density blend of live beneficial bacteria, it actively consumes organic sludge, uneaten food, and decaying organic waste while neutralising toxic ammonia and nitrites. By establishing and supporting a strong nitrifying bacterial colony, API Marine Stress Zyme promotes a stable, crystal-clear aquatic ecosystem. It is completely safe for delicate marine life—including hard and soft corals, invertebrates, and live rock—making it an essential treatment for new tank setups, weekly maintenance, and emergency water quality recovery.
Usage & Application
When to Use
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New Marine Tank Setup: Use during initial cycling to jump-start the biological filter and prevent ammonia spikes.
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Routine Maintenance: Dose weekly to keep substrate clean, extend filter media life, and maintain clear water.
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Ammonia or Nitrite Spikes: Administer immediately during water quality emergencies to detoxify harmful waste compounds.
How to Use
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Shake bottle thoroughly before use.
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New Tank Setup: Add 5 mL per 38 L (10 US gallons) of aquarium water immediately after setup, and continue weekly for the first month.
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Regular Maintenance: Add 5 mL per 10 gallons once a week to support the biological filter and maintain healthy water conditions.
- Water Quality Spikes (Ammonia or Nitrite Spikes): If you notice high ammonia or nitrite levels, dose 10 mL per 10 gallons (38 L) to help neutralise toxins and support biological filtration, accelerating waste breakdown and restoring biological balance.
Product Specifications & Highlights
Key Features
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Live Bacterial Strain: Packed with live beneficial bacteria targeted specifically for saltwater conditions.
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Reef & Invertebrate Safe: Gentle formula that will not harm corals, clams, crustaceans, or sensitive marine fish.
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Sludge & Waste Digestor: Breaks down trapped organic debris in substrate and filter media to enhance clarity.
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Rapid Stabilisation: Helps accelerate initial nitrogen cycling and stabilises parameter fluctuations.
Product Details
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Brand: API
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Product: Marine Stress Zyme
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Product Type: Biological Additive / Water Conditioner
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Volume: 473 ml (treats up to 3,600 L total aquarium volume across standard doses)
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Environment: Marine & Reef Aquariums Only
Additional Information
- For New Aquariums: API Marine Stress Zyme is an essential product for new marine tanks. It helps kick-start the nitrogen cycle, ensuring your tank is properly filtered and reducing the risks of harmful toxins that could harm your fish and invertebrates.
- For Established Aquariums: Regular use of API Marine Stress Zyme supports the continued growth of beneficial bacteria and ensures that your biological filter is always functioning optimally.
- During Ammonia/Nitrite Spikes: In cases of high ammonia or nitrite levels, use API Marine Stress Zyme to detoxify and restore balance in your tank.
- Safe for Sensitive Species: Ideal for tanks with delicate species such as corals, invertebrates, and small fish, as it doesn’t harm beneficial aquatic life.


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