🔄 Nitrogen Cycle Tracker

Master the nitrogen cycle without harming livestock. Calculate exact pure ammonia dosing, simulate bacterial colonisation curves (Nitrosomonas & Nitrospira), and validate your 24-hour clearance test.

Day 1 Initial Ammonia Dose
80 drops (approx 4.0 mL)
Target: 2.0 ppm in 20 Gal
Add dose, let the filter circulate for 30 minutes, then test with liquid test kit (API Master Kit) to confirm target ppm before waiting.
🧪 Interactive Timeline Simulation Day 14
Ammonia (NH₃/NH₄⁺)
0.50 ppm
Nitrite (NO₂⁻)
3.80 ppm
Nitrate (NO₃⁻)
22.0 ppm
Phase 2: Nitrite Spike Peak
Ammonia-oxidizing bacteria (Nitrosomonas) have multiplied and are rapidly turning ammonia into nitrite. Nitrite is spiking as the second bacterial colony (Nitrospira) begins to seed.
🏁 The 24-Hour Clearance Test (Final Verification)

To verify your biofilter is truly mature: dose ammonia to 2.0 ppm, wait exactly 24 hours, and test your parameters. Enter your test tube results below:

🎉 CYCLED & READY! Your biofilter cleared 2 ppm ammonia to 0.0 ppm Ammonia and 0.0 ppm Nitrite in 24 hours. Perform a 50% water change to reset high nitrates (<20 ppm), then you can safely introduce your first fish!