Establish Crop-Stage EC and pH Targets
1 hourDefine EC and pH setpoints for seedling, vegetative, and flowering stages; calibrate meters with fresh buffer solutions.
Intermediateongoing
Nutrient Management Plan
Complete guide for nutrient management plan — step-by-step workflow, tools, checklist, and expert tips to get started.
crop managershydro growers
Workflow
Prepare Stock Solutions and Dilution Chart
2 hoursMix A/B stock concentrates, calculate dilution ratios for target EC at current reservoir volume, label with date and batch.
Log Daily pH, EC, and Top-Off Volume
Daily 15 minRecord morning readings before lights-on, top off with pH-adjusted water, note EC drift direction for uptake diagnosis.
Execute Scheduled Water Change and Reset
1–2 hours weeklyDrain reservoir at calculated interval, scrub biofilm, refill at stage-appropriate EC, verify pH after 30-minute equilibration.
Tools Used
- Nutrient Solution EC CalculatorPrimary
Sets and tracks EC targets through each crop growth stage.
- pH Adjustment CalculatorPrimary
Calculates acid or base dose for daily pH correction in reservoir.
- Nutrient Stock Solution DilutionSupporting
Maintains dilution chart from stock concentrate to working solution.
- Hydroponic Water Change IntervalReference
Triggers full reservoir reset when EC drift or age exceeds thresholds.
Checklist
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Water Quality
Electrical
System
Monitoring
Maintenance
Equipment
Reference Materials
Nutrient Stage TargetsTable
Nutrient Stage Targets
| Stage | EC mS/cm | pH |
|---|---|---|
| Seedling | 0.8–1.2 | 5.8–6.0 |
| Vegetative | 1.4–2.0 | 5.8–6.2 |
| Flowering | 2.0–2.8 | 6.0–6.5 |
| Flush | 0.0–0.4 | 6.0 |
pH AdjustmentFormula
Acid dose ∝ (current pH − target pH) × reservoir gallons × alkalinity factor — always add slowly.
Meter CalibrationStandard
Calibrate pH probe weekly and EC meter monthly with fresh standards.
Stabilize pH First
Adjust pH before adding nutrients — pH drift after mixing wastes expensive inputs.
Root Zone Temp
Keep reservoir 65–70°F — warmer water holds less oxygen and invites root rot.
Electrical Safety
Drip loops on all cords entering reservoirs and GFCI on every outlet.
Safety Notes
- Keep electrical components away from water — use GFCI outlets for all pumps and lights.
- Monitor pH and nutrient levels daily — imbalances kill plants quickly.