I have had an Optima for about 2 months now. Have an ozonator and a Spa Frog cartridge and use dichlor. We've been busy lately and have not used the tub too much. I check the chlorine and ph daily. My question is regarding the level the chlorine should be kept at. I know with the ozone you can keep it as low as .5. It seems when I let it get that low my water takes on a greenish tinge. I've been trying to bump it up to about 2 or 3 daily if the reading is below 2 regardless of use. Should I be doing this? Also, if I've already bumped the chlorine up to around 2 or 3 then end up using the tub later that day, should I still add 1 tsp. of dichlor for each person after use? Plus I add 3 TBSP. of dichlor weekly regardless of usage. Is this routine alright or am I just wasting dichlor? Thanks!