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Tracking & safety zones
See the drift
before it gets expensive.
pH, KH, nitrates and 14 parameters tracked over time. The safety zone shows in green — from your fish, your tank type or your own thresholds — and one glance tells you whether all is well.
10 seconds to log after each test · Unlimited history
The safety zone
A safe range tailored to your tank
Not a generic range out of a book: the safety zone adapts to your tank. And the app always tells you where it comes from — no black box.
Three levels, in order: your own thresholds if you set them, otherwise the common range of the fish present, otherwise the reference range for the tank type.
- "Fish present" — the range compatible with the tank's actual livestock.
- "Tank type" — default references for community, planted, reef.
- "Custom" — your own targets, when you know what you're doing.
- pH — 6.5 – 7.5 · fish present
- KH — 4 – 8 dKH · tank type
- NO₃ — < 20 mg/L · custom
Clear alerts
The app tells you what to look at
Each tank shows a health state — Stable, Keep an eye on it, Action required — which is never an opaque score: it's the worst current alert, with the data that triggered it.
The strictest safety rule: the slightest trace of ammonia or nitrite goes straight to critical. For the rest, a slight overshoot is a warning, a clear overshoot an alert.
- Out of range, rapid change, stale reading — each situation has its own alert.
- Smart silence — mute an accepted value; the app raises it again by itself if it gets worse.
- Everything is explained — the value, the range, the gap: never a verdict without evidence.
- Action required — NO₂ detected (0.25 mg/L)
- Keep an eye on it — pH rising fast (+0.4 in 2 days)
- Temperature, KH, NO₃ — within range
The chart & the cycle
Your water's story, faithful
Every reading feeds a zoomable curve, with the green band of the safety zone and your water changes marked on it — you finally see the real effect of each maintenance.
And to get started right, a cycling guide walks you through phase by phase: the ammonia spike, the nitrite spike, then the "ready for fish" green light — never on a single reading, always on data that holds up.
- Unlimited history — the chart stays clean even after years of readings.
- Tuned to your water — reef tracks salinity, KH, calcium, magnesium; freshwater tracks temperature, pH, KH, nitrate.
- During cycling, the expected ammonia and nitrite spikes don't trigger a false alarm.
- Ammonia spike — done
- Nitrite — falling
- Almost ready — a little more patience
Frequently asked
What people often ask
Where does the safety zone come from?
Am I alerted if a parameter leaves the zone?
How many parameters can I track?
Is parameter tracking a paid feature?
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