Tropical Nitri-Active Biological Aquarium Starter 100ml

Tropical Nitri-Active 100ml is a biological water treatment containing live strains of nitrifying and denitrifying bacteria, designed to establish and maintain a stable nitrogen cycle in freshwater aquariums. It is suitable for new set-ups looking to mature quickly, as well as established tanks that need a bacterial boost following maintenance or medication.

What It Does

• Introduces beneficial nitrifying bacteria directly into the aquarium
• Accelerates the aquarium maturation period, allowing fish to be introduced sooner
• Actively reduces toxic ammonia and nitrite concentrations
• Replenishes bacterial populations after filter cleaning or substrate disturbance
• Restores biological balance following antibiotic or other chemical treatments

Formulation

Tropical Nitri-Active is a 100% natural product, free from synthetic additives. It combines aerobic bacteria with facultative anaerobes — bacteria capable of functioning in both oxygen-rich and oxygen-depleted conditions. This dual-action approach ensures the nitrogen cycle operates effectively across different zones of the aquarium, including within substrate and filter media.

When to Use It

Use Tropical Nitri-Active when setting up a new aquarium to shorten the cycling period, or add it to an established tank after any event that disrupts the biological filter — including cleaning, partial substrate changes, or a course of antibacterial treatment. Regular use supports the natural self-cleaning processes that keep water parameters stable long-term.

For any keeper who has dealt with an ammonia spike or a stalled cycle, having Tropical Nitri-Active on hand is straightforward insurance. Consistent biological filtration means more stable water chemistry and less intervention over time.