Use an alternative like Bromine Tablets or Stabilised Chlorine Granules. Bromine tablets kill bacteria like Chlorine tablets, but they don’t have the same negative side effects over time, and Acrylic manufacturers approve them. If you’re using O2 soft and gentle with Chlorine Tablets in a floating dispenser, we recommend switching to Bromine tablets, as they can be used in conjunction with O2.
If you prefer not to use Bromine, Stabilised Chlorine Granules are another option. These granules dissolve instantly, but they require more frequent additions and testing of the water. Chlorine granules don’t contain the same aggressive compounds as Chlorine Tablets, making them more suitable for acrylic hot tubs and swim spas.