Find out on a laptop, not on a crop.
Carbonate equilibrium solved by charge balance, so hard water resists an acid dose and then falls off a cliff exactly as it does in a tank. Plant uptake that changes with vapour pressure deficit. Carbon dioxide leaving an aerated reservoir, which is why pH climbs back after you corrected it. Every one of those breaks a controller written without it.
The comfortable middle. Enough buffer to forgive a small mistake, little enough that a day of dosing does not exhaust it.
This configuration held the crop
- Acid used
- 446 mL
- Nutrient used
- 1,175 mL
- Water topped up
- 1,224 L
- Discharged
- 0 L
- Simulated
- 552 h in 360 ms
| Stage | pH in band | pH seen | EC in band | EC seen | Water max | DO min | Dryback | Runoff − feed | Shots |
|---|---|---|---|---|---|---|---|---|---|
| Nursery | 96% | 5.63 – 7.21 | 99% | 0.66 – 0.95 | 22.6 °C | 8.0 | 0% | +0.01 | 1 |
| Grow-out | 97% | 5.77 – 6.49 | 98% | 0.74 – 1.46 | 22.3 °C | 8.8 | 0% | +0.01 | 1 |
| Finish | 97% | 5.77 – 6.48 | 98% | 0.95 – 1.33 | 21.3 °C | 8.9 | 0% | +0.01 | 1 |
What it said while it ran
- warn No confirmed circulation flow — dosing held. · first at hour 0.0, 1 times
Every band on this site is a literature-derived starting point. None of them has been measured on your water, your cultivar or your polyhouse, and the variable that decides most of it — the alkalinity of what comes out of your borewell — is one this page cannot know. Validate on a small block before you commit a season.