Sapphire Spas have been testing our Clearzone DOUBLE DOSE water clarity system. The attached picture is after a week with no chlorine whatsoever and bather use of 2 people every day. It’s been hot and humid here the last few days, so some pretty sweaty bodies going into the water each day. We had to add the fake flower to actually prove there was water in this spa! Looked empty without it! Like bathing in drinking water!