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🧪 Experiment Scope
- Window: 17-day system observation (Phase 1 completion → Phase 2 activation)
- Primary objective: Nitrate-control without forced schedule-based intervention
- Secondary objective: Validate ecosystem self-regulation across flow, plants, and filtration layers
━━━━━━━━━━ PHASE 1 — Completion Log ━━━━━━━━━━
- Goal: Complete reset stabilization after deep-maintenance and Day 0 nitrate experiment start.
- Method:
- Hold normal feeding rhythm with no emergency water-change override.
- Track nitrate response against plant uptake and filtration consistency.
- Use targeted BBA observation points instead of broad chemical escalation.
📅 Day-by-Day Checkpoints (Phase 1)
- Day 1–3:
- Post-reset nitrate collapse into low range confirmed.
- No instability signals in fish behavior or circulation pattern.
- Day 4–7:
- Plant mass maintained active uptake with no major melt cycle.
- Flow distribution remained even across display and sump return zones.
- Day 8–12:
- Nutrient curve remained controlled with no abrupt spike event.
- BBA pressure stayed localized to prior hardware-prone zones.
- Day 13–17:
- System held stability without forced reset maintenance.
- Phase 1 exit criteria met: controlled nitrate trend + stable biological response.
🧰 Phase 1 Technical Notes
- Filtration behavior:
- Mechanical pathway remained consistent after prior media refresh.
- No major evidence of flow choke or restart instability during observation window.
- Plant subsystem:
- Refugium + display mass continued acting as primary nutrient sink.
- Trim discipline prioritized dead-zone removal over aggressive reshaping.
- Algae control posture:
- BBA monitored as indicator species for imbalance pockets.
- Escalation threshold deferred pending Phase 2 flow optimization results.
━━━━━━━━━━ PHASE 2 — Activation Protocol ━━━━━━━━━━
- Activation trigger: Phase 1 stability confirmed across nitrate, behavior, and mechanical flow.
- Phase 2 objective: Convert stability into repeatable balance by tightening flow-path efficiency and nutrient capture continuity.
🚀 Phase 2 Action Stack
- Flow Optimization Layer
- Prioritize return-path uniformity to reduce detritus settlement pockets.
- Use hardware-zone inspection points as recurring turbulence checks.
- Nitrate-Control Layer
- Continue nitrate-driven water change logic (no calendar-first resets).
- Track trend direction over point readings to avoid over-correction.
- Ecosystem-Balance Layer
- Keep plant mass density stable in both display and sump zones.
- Preserve biological filtration continuity during any minor media adjustments.
📌 Phase Conclusions & Forward Controls
- Phase 1 result: Completed successfully with stable nitrate behavior and no corrective emergency maintenance events.
- Phase 2 status: Active.
- Next validation target:
- Confirm flow optimization lowers recurring BBA pressure zones.
- Confirm nitrate-control remains stable under normal feeding variance.
- Confirm system can sustain balance with minimal intervention cadence.
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