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Nitrogen Cycle Tracker

Log your water readings and watch the cycle unfold

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Current phase
Add your first reading to begin tracking
Ammonia (NH₃)
Target: 0 ppm
Spikes first, then crashes
Nitrite (NO₂)
Target: 0 ppm
Lags ammonia, then crashes
Nitrate (NO₃)
Target: <20 ppm
Climbs slowly — do water changes
pH
Target: 6.8 – 7.4
Betta ideal range
Hardness (dKH)
Target: 3 – 8 dKH
Soft to moderately hard

Nitrogen Cycle — NH₃ · NO₂ · NO₃ (ppm)

Ammonia
Nitrite
Nitrate

pH

Adding Readings

Edit water-log.csv directly in any text editor and refresh this page.
Columns: date · ammonia · nitrite · nitrate · ph · dkh
Leave a cell empty if you didn't measure that value. 

date,ammonia,nitrite,nitrate,ph,dkh
2026-04-22,0.5,0,0,7.3,3
2026-04-25,0.5,,,,

Reading Log