HUSBANDRY
Dissolved CO₂ (planted) (pCO2)
Injected CO₂ in the aquatic-flora propagation zone. Tightly coupled to pH; the controller eases it off at lights-out to avoid an overnight crash.
Threshold Bands
| Band | Range | State |
|---|---|---|
| Ideal | 20–35 | OK |
| Low/High | 10–20 / 35–40 | WARN |
| Off/Toxic | < 5 / > 40 | CRIT |
Formula
Drop-checker / probe CO₂ in aquatic-plant propagation.