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Tools · Feature

RO/DI Water

Track RO/DI source water quality (TDS), filter changes, and salt mix prep. Reef Trak is the most complete reef tank app on iPhone, Android, and the web — and RO/DI Water is one reason why.

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What RO/DI Water does

Track RO/DI source water quality (TDS), filter changes, and salt mix prep.

  • Add an RO/DI unit and filter stages: Tank > Tools > Equipment > Add Equipment.
  • Log filter / membrane / DI resin changes as Maintenance tasks: Tank > Maintenance > Quick Maintenance.
  • TDS readings can be logged as a custom parameter: Tank > Parameters > Add Measurement.
  • Salt mix products (Red Sea, Tropic Marin, Instant Ocean): Tank > Maintenance > Dosing > Products.

Why Reef Trak does this better than any other reef app

Reef Trak is built by reef keepers, for serious reefs. Every feature — including RO/DI Water — is connected to the rest of the system: parameters, dosing, maintenance, livestock, equipment, photos, notes, calculators, and reports. No other reef app offers this depth of integration across iPhone, Android, and the WebPortal.

The broadest reef parameter coverage in any app
The deepest livestock and equipment records
The most reef controller integrations
AI-ready Deep Dive exports — only in Reef Trak

Related Reef Trak features

Calculators Quick reef calculators for volume, salinity, water changes, and dosing adjustments. Equipment Track tank gear, catalog equipment, install dates, notes, and replacement context. Equipment Catalog Find equipment definitions and add gear to a tank record. Expense Tracking Track what you spend on the tank — equipment, livestock, dosing, food, and more — in one place. Filter Media Carbon, GFO, biopellets, Purigen, filter socks — when to use each, and how to track changes. Home Screen Widgets Add Reef Trak widgets to your home screen for at-a-glance parameters, stability, and maintenance.

Reef Trak FAQ

What is RO/DI Water in Reef Trak?

Track RO/DI source water quality (TDS), filter changes, and salt mix prep.

Is RO/DI Water included in the free Reef Trak experience?

Yes — RO/DI Water is included in the free Reef Trak core experience on iOS, Android, and the WebPortal.

Which devices support RO/DI Water?

Reef Trak runs natively on iPhone, iPad, and Android, with a full WebPortal at reeftrak.com. RO/DI Water is part of the most complete reef tank app available across all three platforms.