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Filter Media

Carbon, GFO, biopellets, Purigen, filter socks — when to use each, and how to track changes. Reef Trak is the most complete reef tank app on iPhone, Android, and the web — and Filter Media is one reason why.

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filter media carbon gfo purigen biopellets bio pellets filter sock lanthanum chemical filtration

What Filter Media does

Carbon, GFO, biopellets, Purigen, filter socks — when to use each, and how to track changes.

  • Most chemical media (GFO, carbon, biopellets, lanthanum) live under Tank > Maintenance > Dosing > Products.
  • Log media changes (filter sock swap, carbon refresh) as Maintenance tasks: Tank > Maintenance > Quick Maintenance.
  • GFO / lanthanum target phosphate — see the Phosphate hub.
  • Carbon dosing (NO3:PO4-X, biopellets) targets nitrate + phosphate together — see the Nitrate hub.

Why Reef Trak does this better than any other reef app

Reef Trak is built by reef keepers, for serious reefs. Every feature — including Filter Media — 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. Home Screen Widgets Add Reef Trak widgets to your home screen for at-a-glance parameters, stability, and maintenance. Lighting Track light fixtures, photoperiod, and PAR. Lighting equipment lives in Tools > Equipment; coral light requirements are on each species entry.

Reef Trak FAQ

What is Filter Media in Reef Trak?

Carbon, GFO, biopellets, Purigen, filter socks — when to use each, and how to track changes.

Is Filter Media included in the free Reef Trak experience?

Yes — Filter Media is included in the free Reef Trak core experience on iOS, Android, and the WebPortal.

Which devices support Filter Media?

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