CoralCalc: Reef Dosing Guide

Reef tank owner? Enter your Alk, Calcium, and Magnesium test results and get exact ml to dose. Supports Red Sea, Brightwell, ESV, Seachem, BRS, and custom solutions.

Reef tank dosing, done precisely. Enter your water test results and get exact ml to add — based on your tank volume and your specific supplement brand.

Stop doing spreadsheet math after every test. Stop using dead web calculators. CoralCalc gives you the answer in seconds.

HOW IT WORKS

1. Set up your tank: enter volume, select supplement brands for Alk, Calcium, and Magnesium, and confirm target levels.
2. Enter today's test results.
3. Get exact ml to dose — with automatic safety splitting if the dose exceeds daily safe limits.

SAFETY LIMITS BUILT IN

CoralCalc automatically splits large doses across multiple days when they exceed daily safe limits:

• Alkalinity: max 1.4 dKH per day
• Calcium: max 50 ppm per day
• Magnesium: max 100 ppm per day

Display: "Dose X ml today. Remaining Y ml over Z more days."

SUPPORTED BRANDS

• Red Sea Foundation A / B / C
• Brightwell Reef Code A / B
• ESV B-Ionic (Alk, Calcium, Magnesium)
• Seachem Reef Fusion 1 + 2
• BRS 2-Part
• DIY / Custom (enter your own concentration)

NOT JUST ONE-TIME CALCULATIONS

Log your test results every time you dose. Build a personal history of your tank's parameters over time. See if your Alk is stable or slowly drifting.

PRO FEATURES

Upgrade to Pro for deeper insights:

• Trend Graphs: See Alk, Calcium, and Magnesium over time with a visual chart.
• Consumption Rate: After 2+ logs, the app calculates how fast your corals consume each element and recommends a daily maintenance dose.
• Dosing Reminders: Daily notification so you never miss a dose.
• Multiple Tank Profiles: Manage a frag tank, display tank, and QT tank separately.
• Export: Download your full parameter log as CSV.

PRIVACY FIRST

All your tank data is stored locally on your device. No account, no cloud, no tracking. Uninstalling the app deletes all stored data.

This app provides dosing estimates based on manufacturer specifications. It is not a substitute for professional aquarium advice.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/