EC and pH Adjustment
Calculate how much pH up/down solution and nutrient concentrate to add to reach target EC and pH levels in your hydroponic reservoir.
Inputs
Results
EC Action
Add nutrients to raise EC
pH Action
Add pH Down (phosphoric/citric acid)
How to Use This Calculator
- Measure your reservoir's current EC (mS/cm) and target EC for your crop stage — seedlings ~0.8–1.2, fruiting crops ~2.0–3.0.
- Measure the current pH and enter your target pH — most crops prefer 5.8–6.2 in hydro systems.
- Enter your reservoir size in gallons so the calculator can compute exact dosing volumes.
- Review the EC Action output: add Nutrient Concentrate (mL) to raise EC, or add Fresh Water (gal) to lower it.
- Follow the pH Action: add the recommended pH Down (mL) or pH Up (mL) solution, then re-check after 15 minutes.
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