pH Magic by GLB Rendezvous
Sorry, this is no longer available.
3.1 lbs, 1.4 kg
When your spa is first filled, or once you've established the pH range between 7.0 and 8.0 ppm, use this patented formulation to lock in your pH level between 7.2 and 7.8. Use every time you refill your spa to lock in the pH level for three months.