# 2026-04-29## 12:02 — TILT Analysis Architecture Discussion### Topher's RequestRoute TILT cron alerts through me (Gemma) for analysis instead of blind notifications directly to PSB group. He's right — the cron scripts are just triggers. I should be doing the analysis autonomously.### Current State- Heartbeat: enabled (30m interval)- GOG access: confirmed working, can pull all 4 spreadsheets- Cron scripts: running every 6h, sending blind Telegram messages when Days at SG > 5### DecisionI will do autonomous fermentation monitoring. Cron scripts can be redirected to notify me or become redundant. I pull data, analyze, reply to group.## 12:16 — Full Fermentation Analysis (On-Demand Pull)### All 4 Spreadsheets Queried| Fermenter | Beer | TILT | Current SG | Temp | Days at SG | Status ||-----------|------|------|------------|------|------------|--------|| Orange | Seltzer Base-4/26 | Orange | 1.023 | 74.7°F | 0 (jumped) | RESTARTED — heated + nutrient boost worked || Pink | 70megOhm | Pink | 1.0133 | 66.4°F | 10.27 | ⚠️ STALLED — 80.9% attenuation, 7.4% ABV || Green | HotForTeacher-4-26 | Green | 1.023 | 41.5°F | 19.8 | ❌ OFFLINE — last reading 4/26, now ~3 days silent || Black | Adams-CiderAle-4-26 | Black | 1.0182 | 64.7°F | 0 | ✅ ACTIVE — dropping fast, fermentation healthy |### Detailed Analysis**Orange (Seltzer Base-4/26)**- SG 1.023, Temp 74.7°F — fermentation resumed after intervention- OG was ~1.068 → 1.023 = 73.7% attenuation expected- Brix dropped 5.4→5.15 during restart — real activity confirmed- **Verdict:** On watch. Heating + pH boost + nutrients did the job. Monitor for clean finish.**Pink (70megOhm) — NEEDS ATTENTION**- SG 1.0133, Temp 66.4°F, Days at SG: **10.27**- OG: 1.0697 → FG: 1.0133 = **80.9% attenuation, 7.4% ABV**- Ferm rate: -0.0015/day (very slow)- Temp avg 67.6°F, acceptable range- **Issue:** Stuck at 1.0133 for 10+ days. At 80.9% attenuation for a DIPA, this seems light. Typically you'd want 85-88% for a big beer.- **Possible causes:** Low nitrogen in seltzer base (no grain), pH stress,temp dip to 65.3°F on 4/28 evening- **Recommendation:** Check pH, consider nutrient addition if packaging soon. At 7.4% ABV it's drinkable but not the 8%+ it might be targeting.**Green (HotForTeacher-4-26) — TILT OFFLINE**- Last reading: 4/26/2026 ~07:45 (SG 1.023, 41.5°F)- Was in cold crash at 41.5°F- **Issue:** TILT silent for ~3 days. TILT may have lost power or stopped transmitting.- **Recommendation:** Check TILT battery / power status**Black (Adams-CiderAle-4-26)**- SG 1.0182 (dropping), Temp 64.7°F- Ferm rate: -0.0053/day (healthy active fermentation)- OG: 1.0614 → current 1.0182 = 70.4% attenuation- Duration: 7.2 days- **Verdict:** Healthy active fermentation. Keep monitoring.### Action Items- [ ] Pink: Check pH, assess if stalled or just slow finish- [ ] Green: Verify TILT power/battery- [x] Orange: Restart successful — monitoring- [x] Black: Active healthy ferment, no action needed## 20:45 — Orange pH Correction**pH reading:** 3.5 (too low — yeast stress range)**Addition:** 110g potassium bicarbonate (KHCO3)**Target:** Raise to ~4.0-4.2 for healthy fermentation**Context:**- pH 3.5 is below the threshold where Saccharomyces activity slows significantly- KHCO3 is the right choice — milder than NaHCO3, adds potassium which is more fermentation-friendly- 110g / 110gal = 1g/gal, which is a reasonable correction rate- Should see pH recovery within 12-24h, then monitor SG movement**Expected outcome:**- pH rises to 4.0-4.3 range- Fermentation should resume more vigorously- SG may drop further from 1.023 as fermentation completes**Follow up:** Next heartbeat — check if SG drops further and if pH has stabilized.