Hydroponics
60-position recirculating system on the east wall. PVC rails, Grodan rockwool, clay pellets, General Hydroponics Flora/Bloom/Grow nutrients. Monitored by a YINMIK water quality sensor (pH, EC, TDS, ORP, water temp).
Water Quality
⚠️ pH reads ~3600+ and ORP reads -1 — both are uncalibrated. The YINMIK sensor needs physical calibration with buffer solutions. EC (1400 µS/cm) and TDS (~700 ppm) appear reasonable for a hydroponic system.
EC & TDS Trend
Temperature
Water temperature tracks air temperature closely but with a lag — the reservoir acts as a small thermal buffer. Target is 65–70°F; current readings run 5–10°F above that.
Status
System Specs
| Property | Value |
|---|---|
| Type | Recirculating NFT |
| Positions | 60 (1–30 top row, 31–60 bottom row) |
| Rails | 4” PVC, 2.5–3” holes |
| Media | Grodan rockwool → net cups → clay pellets |
| Nutrients | General Hydroponics Flora/Bloom/Grow |
| Grow lights | 14× Barrina 2FT directly overhead (7 top, 7 bottom) |
| Monitoring | YINMIK water quality via BLE → HA → TimescaleDB |
The east zone’s natural microclimate — coolest in the greenhouse by 5–9°F at peak — makes it ideal for leafy greens, herbs, and strawberries.