HUSBANDRY
Station pH (sPH)
Per-zone pH against species-specific setpoints. In CO₂-injected planted zones a daytime drop is expected coupling, not a crash — zone context is everything.
Threshold Bands
| Band | Range | State |
|---|---|---|
| In band | setpoint ±0.2 | OK |
| Drifting | ±0.2–0.4 | WARN |
| Crash | > ±0.4 | CRIT |
Formula
In-tank pH, per species setpoint; planted zones CO₂-coupled.