Twilight, MPL, LH, Therapool Outer Top Locking Filter PMA-R1 Parts Spa Shock is chlorine free

Spa Shock is chlorine free and will destroy foreign contaminates in your hot tub/spa which reduce the effectiveness of Bromine and Chlorine as a disinfectant and will restore water clarity

In one simple weekly treatment the patented environmentally friendly formula gets to the root of the problem by loosening this layer of slime from the surfaces

Great for hot tubs

works with radius corners up to 13"

calcium and organic compounds

Twilight, MPL, LH, Therapool Outer Top Locking Filter PMA-R1 Parts Spa Shock is chlorine freeOriginal Equipment Master Spas Filter Cartridge. Replacement parts from the manufacturer guarantee an exact fit and match, and are the best quality replacements available. If your model is not listed please call us at 519 895 0606 ext. 1 Model Compatible with Twilight series TS 6. 2, TS 67. 25, TS 7. 2, TS 7. 25, TS 8. 2, TS 8. 25 Michael Phelps Legend Series All MPL models LH series All LH models H2X Swim Spas Therapool SE, Therapool D Filter