I think the chloramines in my indoor hot tub need to be reduced. The water smell like chlorine. Here are the results of testing the water:
Early morning of 17 Oct:
CC: about 0.7
The hot tub was filled (300 gallons) on 12 Oct. I have been adding 2 oz bleach (Chlorox 6 %) after each use. Normally, only 2 people use the tub and always after showering. The bleach has been used as a sanitizer but do I need to use something as an oxidizer?
In the evening of 17 Oct the FC had dropped to less than 0.5 . The CC was not measured. This was after 2 children had used the tub and had not showered. I shocked by adding 8 oz bleach.
18 Oct the FC was 4.5 and the CC was 1.0. Two oz bleach was added.
19 Oct the FC was 2.5 and the CC was about 0.7 ppm. I added 8 oz bleach.
20 Oct the FC was 7.5 but the CC was still about 0.7 ppm.
What are your recommended actions? I need to get rid of the chlorine smell. Water looks great but we know it is not.
Side question: Last year we did not use borates in the tub and did not have a foaming issue. This year we are using borates and there is much foam generated when the air from the blowers is maximized. Do borates in the water cause foaming and what can I do to eliminate this foam?