Free demo: The Hydro Reservoir Manager by HarvestMath

Settings and export

Your meter's ppm scale

PPM is EC times 500, 640 or 700, depending on the meter. Check your meter's manual. The app works in EC and converts for you.

Calendar

Downloads each reservoir's next full change and its check days.

Back up

Everything lives only in this browser.

Restore backup

Start over

Removes every reservoir and reading on this device.

Where the numbers come from

Follow your nutrient's label, wear gloves with pH adjusters, and keep concentrates away from children and pets. Calibrate meters regularly. Your data stays on this device.

The Hydro Reservoir ManagerMix it right, read it right, change it on time: every reservoir kept in range. From HarvestMath.

Settings and export

Where the numbers come from