After reading multiple threads about it, I recently converted to chlorine from bromine when I drained and refilled our tub. We chose bromine initially because my wife is very sensitive to chemicals, and has had a reaction to chlorine in pools in the past. The bromine was somewhat okay, but caused my wife's nose to itch, and definitely has a bromine smell. We've been using the chlorine tub for about a week now and love it. My wife has had no reaction to the chlorine at all, there is no smell in the tub, and no smell left on the skin.
I have used dichlor to build up the CYA level to 34 ppm by calculation. I was just reading a thread in the deep end about CYA being lost due to heat, including bright sun and the water getting over 90 degrees. Our tub is in the garage so there is no direct sun, but the temperature is kept between 90 and 100+ degrees. Since I set up my test kit for bromine, I do not have the test for CYA. Will the CYA dissipate over time in the tub? I have assumed up to this point that it would work to get the CYA level where you want it by calculation and that it would stay at that level, minus a small amount of carry out, until refill. Is that assumption wrong? As far as I can remember, there is nothing about CYA dissipating in the write-up about using chlorine either here or on the pool and spa forum. Do I need to get the test for CYA for my test kit setup?
I have used dichlor to build up the CYA level to 34 ppm by calculation. I was just reading a thread in the deep end about CYA being lost due to heat, including bright sun and the water getting over 90 degrees. Our tub is in the garage so there is no direct sun, but the temperature is kept between 90 and 100+ degrees. Since I set up my test kit for bromine, I do not have the test for CYA. Will the CYA dissipate over time in the tub? I have assumed up to this point that it would work to get the CYA level where you want it by calculation and that it would stay at that level, minus a small amount of carry out, until refill. Is that assumption wrong? As far as I can remember, there is nothing about CYA dissipating in the write-up about using chlorine either here or on the pool and spa forum. Do I need to get the test for CYA for my test kit setup?