Tap the + button on the Tanks tab. Enter your tank name and volume in gallons, then tap Add.
Open a tank, then tap "Log Parameters." Use the +/- steppers or tap the number to type directly. Swipe through all parameters and tap Save.
Go to the Dosing tab, select your parameter (Ca, Alk, or Mg), choose your product (BRS, ESV, etc.), enter current and target values, then tap Calculate Dose. The app calculates the exact mL needed for your tank volume.
The free tier shows 7 days of parameter history. Upgrade to ReefDiary Pro to unlock your full history with trend charts.
Go to Settings > your Apple ID > Subscriptions on your device. You can manage or cancel your ReefDiary Pro subscription there.
Your data is stored locally on your device. It is included in your iCloud device backups if you have them enabled.
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