Greenhouse · hydroponics
RESERVOIR TOP-OFF
The daily question: the plants drank, the EC drifted — what do you add right now? Enter the reservoir as it stands and where you want it; the engine solves the dose — concentrate parts, plain water, or both — and tells you plainly when the honest answer is a dump-and-remix instead. Brand-agnostic: it works from your recipe's rates, not a product database. Nothing leaves your browser.
Last mix recipe — full-strength rates
How it solves: EC blends linearly by volume. A part mixed at its full-strength rate contributes that recipe's full-strength EC — the number you entered above, measured on your own fresh batch. Your brand's chart EC is the right value; the 2.0 pre-fill is only a placeholder.
Add concentrates
Dump-and-remix advisory
- The correction needs 120.0 L of full-strength equivalent into a 40 L reservoir — more solution than the tank holds. That is a remix wearing a top-off costume: dump and remix.
| Part | Rate | Add |
|---|---|---|
| Part 1 | 5 mL/gal | 158.5 mL |
| Part 2 | 5 mL/gal | 158.5 mL |
| Part 3 | 5 mL/gal | 158.5 mL |
| Total concentrate | 475.5 mL | |
- Full-strength equivalent
- 120.00 L
- Volume after
- 160.00 L
- EC after
- 1.80 mS/cm
- PPM now → target (500 scale)
- 600 → 900
- PPM now → target (700 scale)
- 840 → 1260
EC is the stored truth — PPM depends on your meter's scale (500 or 700), so both are shown. Stir and re-read after dosing; meters settle slower than math. This engine doses nutrients only — it does not dose pH.