Reef Ledger

Log reef parameters, calculate two-part doses, and plan water changes. Built for saltwater and reef tanks.

Reef Ledger is the parameter logbook built for saltwater and reef aquarists. Log alkalinity, calcium, magnesium, nitrate, phosphate, salinity, temperature and pH per tank, add your own custom parameters, and watch every value on trend charts. A two-part dose calculator works out the milliliters to add for alkalinity, calcium and magnesium from your target shift, tank volume and product strength. A water-change planner handles salinity mixing and salt-mix math, and a maintenance schedule keeps your routine on track. Everything is stored on your device. Free to download. Reef Ledger Pro is an auto-renewing subscription (Monthly $2.99 or Yearly $19.99) that unlocks unlimited tank profiles, time-sensitive maintenance reminders and CSV export. Your subscription renews automatically until canceled; manage or cancel anytime in your Apple ID settings.

Reef Ledger offers an auto-renewing subscription: $2.99/month or $19.99/year. Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless canceled at least 24 hours before the end of the current period; manage or cancel anytime in your App Store settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://dtsfinest.github.io/appforge-pages/reef-ledger/support.html