The Apollo Spas 25 R is a compatible replacement for the following pool filters:
The Apollo Spas 25 Square Ft Comp. Pool and Spa Filter measures 4 15/16" x 13 5/16" with 2 1/8" Open top and bottom styles. This compatible Apollo Spas filter features 25 square feet of media area with 3 ounces of media weight. This pool water filter purifies swimming pool and spa water, and also reduces contaminants.