ReefDose - Dosing Calculator

Stable water chemistry made simple. Calculate doses, track parameters & never miss a reef task — now with more features free, plus a 7-day Pro trial.

ReefDose helps reef keepers calculate accurate supplement doses, track water chemistry, and stay on top of aquarium maintenance.

Keeping a reef tank stable should not require messy spreadsheets, dosing guesswork, or mental math. ReefDose brings your reef tank dosing calculator, water parameter log, maintenance reminders, trend charts, and tank records into one clean app built for saltwater aquarium hobbyists.

FREE TO START

Download and run your first tank completely free:

• Full dosing calculator with your first supplement product • Unlimited water test logging • 7-day trend charts • Maintenance and testing reminders • Livestock tracking for your coral, fish, and inverts

Want more? ReefDose Pro unlocks everything — and the annual plan includes a 7-day free trial.

CALCULATE REEF TANK DOSES

Quickly calculate supplement doses for your aquarium based on tank volume, current levels, and target parameters.

ReefDose supports:

• Two-part dosing for calcium and alkalinity • All-in-one reef supplements • Trace element dosing • Custom supplement products • Flexible tank volume and unit settings

Enter your values, choose your target, and let ReefDose handle the calculation.

TRACK WATER PARAMETERS

Log and monitor the reef tank parameters that matter most: alkalinity, calcium, magnesium, pH, nitrate, phosphate, salinity, temperature, ammonia, nitrite, potassium, iodine, iron, strontium, ORP, PAR, TDS, and more.

See trends over time, compare results, and understand how your aquarium responds after dosing, water changes, feeding, and maintenance.

SMART TANK INSIGHTS

ReefDose helps you spot changes before they become problems. Use charts and history to monitor parameter stability, review past test results, track progress toward target ranges, and understand your reef tank's chemistry patterns. Pro extends your charts from 7 days to your tank's full history.

MAINTENANCE REMINDERS

Never lose track of important reef keeping tasks again. Create reminders for water changes, testing schedules, top-offs, filter cleaning, media changes, equipment maintenance, probe calibration, feeding, and custom tasks. Check off tasks as you complete them and keep every tank on schedule.

TRACK YOUR LIVESTOCK

Build a living record of your reef. Log coral, fish, and invertebrates with photos, species, source, and dates — and keep loss records that help you diagnose tank issues.

MANAGE MULTIPLE AQUARIUMS (PRO)

ReefDose Pro is built for reef keepers running many systems: display tanks, frag tanks, quarantine tanks, nano reefs, and SPS, LPS, or mixed reef systems. Each tank has its own parameters, dosing history, reminders, and reports.

REEFDOSE PRO

Upgrade to unlock:

• Unlimited tanks • Unlimited dosing products • Full trend history • Maintenance and equipment log with service intervals • Home Screen widgets • Private iCloud sync across your Apple devices • CSV and PDF export

Try every Pro feature free for 7 days with the annual plan. Subscriptions auto-renew unless cancelled at least 24 hours before the end of the current period. A one-time lifetime purchase is also available.

WHY REEF KEEPERS USE REEFDOSE

• Fast reef dosing calculator • Water chemistry tracker • Maintenance reminders • Multi-tank management • Trend charts and history • Custom supplement support • CSV and PDF export • Optional iCloud sync • No third-party tracking

ReefDose is designed for reef hobbyists who want a simpler way to maintain stable water chemistry and healthier coral growth.

Your corals need stability. ReefDose helps you stay consistent.

Privacy Policy: https://khsalman.github.io/reefdose/privacy Terms of Use: https://khsalman.github.io/reefdose/terms