Josh is reading it correctly: across the flower rooms substrate EC is tracking the moisture curve, not building an independent stack. Feed EC at the dripper averages 2.56 mS/cm, substrate (pore) EC averages 3.9 mS/cm, and runoff sits at 3.58 mS/cm — the whole system is running within a narrow ~1 mS band of the feed. When feed EC is set close to what the plants pull, the salts in the medium just concentrate on dryback and dilute on the next shot; there is no headroom left over to accumulate. That is exactly the "mirroring, not stacking" pattern.
The rooms prove it three ways. Most rooms hold EC flat over the 14 days — Flower 1B, Flower 2, Flower 7, Flower 8 all sit within ±0.4 mS start-to-end. Flower 3 is the one room genuinely stacking (2.66 → 6.25 mS) — it runs the fewest shots (4.0/day), so its dryback concentrates salt without dilution. Flower 4 is the opposite failure — EC leaching out 3.31 → 1.65 mS on the highest shot count (13.8/day) — too much volume washing the stack. Both extremes point to the same lever: feed EC is the setting to move.
The fix. Raise feed EC by a few points, to 3.0 mS/cm or slightly higher, so the root zone has headroom to hold a stack through the dry-down instead of tracking it. Move gradually and watch runoff EC and overnight dryback — you want substrate EC to start holding through P3 rather than spiking and collapsing with each cycle.
Phases are inferred from each room's observed P3 dry-down depth, not a harvest-group roster (not pulled this run). Reference bands are practitioner benchmarks, not Show Me Organics targets.
Josh tiene razón: la CE de sustrato sigue la curva de humedad en vez de acumularse. Solución 2.56, sustrato 3.9, drenaje 3.58 mS/cm — todo dentro de ~1 mS. La solución: suba la CE de entrada a 3.0 mS/cm o algo más para dar margen a que el sustrato mantenga el stack durante el secado. Flower 3 acumula (2.66→6.25); Flower 4 se lava (3.31→1.65).
Substrate EC is the output of steering, not a feed setting. The column that matters is the trajectory (first 3 days → last 3 days): is the root zone stacking, holding, or leaching? Read it against shots/day and VPD.La CE de sustrato es el resultado del manejo. La columna clave es la trayectoria.
| Room | Observed P3 depthProfundidad P3 | VPD on | VWC envelope | Pore EC mean | EC trajectory (3d→3d)Trayectoria CE | Dryback pp | Shots/day |
|---|---|---|---|---|---|---|---|
| Flower 1B | moderate P3 · bulking-depth | 1.32 | 27.6–46.7% | 4.07 | 3.88 → 4.23 steady | 19.1 pp | 11.8 |
| Flower 2 | shallow P3 · veg-depth | 1.19 | 29.6–40.9% | 3.79 | 3.51 → 3.31 steady | 11.3 pp | 6.9 |
| Flower 3 | moderate P3 · bulking-depth | 1.31 | 24.9–36.9% | 4.58 | 2.66 → 6.25 stacking | 12.0 pp | 4.0 |
| Flower 4 | moderate P3 · bulking-depth | 1.42 | 34.6–53.3% | 3.05 | 3.31 → 1.65 leaching | 18.7 pp | 13.8 |
| Flower 5 | shallow P3 · veg-depth | 1.55 | 29.6–37.0% | 4.75 | 5.21 → 4.28 leaching | 7.4 pp | 1.6 |
| Flower 6 | moderate P3 · bulking-depth | 1.32 | 29.8–46.6% | 2.38 | 3.64 → 4.62 stacking | 16.8 pp | 6.9 |
| Flower 7 | moderate P3 · bulking-depth | 1.41 | 27.8–46.3% | 5.23 | 4.97 → 5.20 steady | 18.6 pp | 12.6 |
| Flower 8 | moderate P3 · bulking-depth | 1.34 | 31.7–46.7% | 3.33 | 3.41 → 3.50 steady | 15.0 pp | 8.5 |
Sensor note: drip EC reading lower than drain EC is normal. A VWC trough alone never proves channeling.Nota: CE de goteo menor que CE de drenaje es normal.
Per room: VWC, substrate EC, substrate temp, VPD, air-temp / RH, CO₂ across the 14-day window. Watch the substrate-EC panel: in most rooms it oscillates with the VWC curve rather than climbing.Por sala: VWC, CE, temp sustrato, VPD, aire/HR, CO₂.
| # | ActionAcción | WhyPor qué | Priority |
|---|---|---|---|
| 1 | Raise feed EC to 3.0+ mS/cmSubir CE de entrada a 3.0+ | Feed averages 2.56 mS — too close to uptake, so substrate can't build a stack. Move up gradually, watch runoff EC + dryback.La solución está en 2.56 mS. | P1 |
| 2 | Flower 4 — cut shot volume / countFlower 4 — reducir riego | EC leaching 3.31→1.65 on 13.8 shots/day — volume is washing the stack out.CE lavándose. | P1 |
| 3 | Flower 3 — watch upper ECFlower 3 — vigilar CE | Only room stacking (6.25 mS) on 4.0 shots/day — good, but keep it from overshooting once feed EC rises.Única sala acumulando. | P2 |
| 4 | Verify Flower 5 sensors / scheduleVerificar Flower 5 | Photoperiod reads ~3 h and ~1.6 shots/day — likely a flip/transition or a probe/room issue; confirm before acting on its numbers.Fotoperiodo ~3 h — verificar. | P2 |
All values are measured from AROYA public_api room-chart data, stitched in 2-day windows to a full 14-day span at ~9-minute native cadence (~2,240 points/series/room). Shots and dryback are derived from VWC step-up signatures (≥0.8 pp between consecutive samples). Overnight dryback is absolute percentage points (daily peak VWC − following pre-irrigation low). Feed/runoff EC use the drip/drain EC channels. Harvest-group roster was not pulled, so growth phase and cultivar per room are inferred from observed P3 depth, not confirmed — reference bands are practitioner benchmarks, not Show Me Organics targets.Valores medidos de AROYA public_api, unidos a 14 días (~2,240 pts/serie). Dryback en pp absolutos. Sin roster de cosecha — las fases se infieren.