Enter your water test results. CoralCalc tells you exactly how many ml of your supplement brand to add — Alk, Calcium, and Magnesium.
Example Calculation
Reference calculator — always verify with a test kit before dosing.
Features
Pre-loaded concentrations for Red Sea, Brightwell, ESV, Seachem, BRS, and custom DIY solutions.
Auto-splits doses that exceed daily safe limits. Never accidentally spike your parameters.
Track Alk, Ca, and Mg over time. See if your parameters are stable or drifting. (Pro)
App learns how fast your corals consume each element. Calculates your ideal daily maintenance dose. (Pro)
Daily notifications so you never miss a dose. Your corals will thank you. (Pro)
No account, no cloud, no internet required. All data stored locally on your device.
Supported Brands
How It Works
Enter volume, select your supplement brands, and set target levels
Type in today's Alk, Calcium, and Magnesium readings
CoralCalc shows precisely how much of each product to add