Essential Nitrifying Filter Bacteria. Highly concentrated @100 billion cells per ml. Rapidly eliminats toxic Ammonia & Nitrite. When to Use Starter Booster: New Pond or new filter installation use every 7th day for 3-6 weeks Spring or when feeding resumes after winter use every 7th day for 2-3 weeks After any chemical treatment to the pond use every 7th day for 1 - 2 weeks When adding new fish stock to any old or new pond use every 7th day for 1-2 weeks Bottle size 1L
£ 18.99
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