I owned a hot tub quite awhile ago (had it for 5 years), in that system I was using bromine. I've not been doing any chemical water maintenance for at least 10 years!

My wife is concerned about her dyed hair turning green and insisted on pristine blue as it's "non-chlorine".

If I try to go full chlorine now, how much do I add and what do I do about my relatively high metals in my water now?

Thanks in advance!!