PMA-R4 (Serial number starting with 24 or lower H2X, Michael Phelps Swim Spas Outer Locking Filter) Legend Serial number can be found

Serial number can be found on sticker in filtration compartment

beach sand

1 of 3 replacement filters for the Twilight Series

ProTeam Spa Gentle Spa improves water condition to leave skin soft and moisturized while reducing eye and skin irritation

The unique SmartChlor® Technology slowly releases over 3-4 weeks

PMA-R4 (Serial number starting with 24 or lower H2X, Michael Phelps Swim Spas Outer Locking Filter) Legend Serial number can be foundFor serial number starting with 24 or lower X268549 Outer Locking Filter to be used in the H2X or Michael Phelps Swim Spas with the EcoPur Charge insert only which is sold separately.