Aquarium Filter Case

Aquarium II Case 18 R.O Pre filters
Includes:
(6 changes):
(6) high capacity sedimentary filters (SED);
(6) high capacity granular activated coconut carbon filters(GAC);
(6) high capacity coconut carbon block filters (CCB)

We recommend changing the Pre filters every 6 or 12 months depending on use. If your average use is approx 2-3 gallons a day then you would change them every 12 months, if your average use is approx 5-6 gallons a day then you would change them every 6 months. or Adjust accordingly for a higher average use ie. for 300 gallons a month you would need to change the filters every 3 months.