The Waterco Opal or Theraclear 180 replacement filter cartridge has 180 sq ft of Reemay filter media and is made by Magnum Filters in New Zealand for Aquatune.
Manufactured from quality Reemay Cartridge Element Media which is made of continuous filaments and does not weave out, heavier and sturdier making it better at capturing smaller particles to 10 microns.
The replacement filter cartridge is suitable for Waterco Opal 180; Paramount 180; Theraclear 180.