HUSBANDRY
Stocking Density (STD)
Biomass per cubic metre in the holding systems. The dial that trades capacity against welfare; crowding drives oxygen demand and disease, so it is always read against station DO and filtration headroom.
Threshold Bands
| Band | Range | State |
|---|---|---|
| Comfortable | ≤ 20 | OK |
| Crowded | 20–40 | WARN |
| Overstocked | > 40 | CRIT |
Formula
Standing stock biomass ÷ working system volume, per holding zone.