OCEAN FREE OF Hydra Cata Pure Cartridge - 4 Piece Pack
- The Cata-Pure Cartridge can last 9 -12 months depending on the amount of fish and is functional in marine environments. Fits all model Hydra Internal Filters, Hydra Filtron & Inline Stream units which take the square cartridge.
- Preventation of cloudy water
- Minimises unpleasan water smell
- Helps prevent "New Tank Syndrome"
- Purification of water and pH-neutral