O Care for Hot TubsO care for Hot Tubs weekly treatment for your spa to remove biofilm and help keep your water clean and clear. O Care removes and prevents sediment build up which allows sanitizers and other chemicals to be much more effective. This means that less chemicals are needed to keep your spa water clean and safe. Because O Care takes out the sediment nutrients, your filter can get even more saturated, so it is really important to clean your filter on a