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Don't change anything. What is being discussed is something affecting a smaller number of people. Just out of curiosity, do you have an ozonator or are you using Nature2/Frog or other metal ion system? How often do you soak each week (number of soaks, how many people, how long per soak)?
I was trying to be funny Chem Geek, but when I did have a tub (currently moved to a country lake home and use sauna) that is the routine I used. And to answer your questions. Yes I used an O3 generator but it only ran for 4-6 hours per day during filtration. I was sceptical on its effectivness except to maintain already sanitized with dichlor water between soaks. Yes I used a Nature 2 stick and again, to maintain dichlor sanitized water between soaks cool but to sanitize.....not for me. Me and my x-wife soaked 1-3 times per week for 30-45 minutes. I maybe soaked longer once in a while. We had friends over a time or two a month and a few big gatherings a year.
Since I continue to get attacked here, I'd like to clear the record.
My comment about adding baking soda and raising PH was said to be wrong by you and if I read it correctly chem geek said PH can be raised by adding baking soda. I also remember from college chemistry that any time you add anything with a different PH (it has been established that baking soda has a PH around 8 or so) the PH of the solution will be changed as well. As I told chem geek I hated chemistry and I retained very little from 20+ years ago but do remember some things. I will agree that PH rises from aeration but others things change it as well.
are there any forms of granular chlorine, such as spa 56, that have less or no cya? is it a hard fact that chlorine effectiveness goes down at the exact rate as cya increases. in other words if cya at twice the recomended level decreases effectiveness by half is it accurate to say that it always decreases at the same rate as cya rises beyond these levels?
are there any forms of granular chlorine, such as spa 56, that have less or no cya?
I am not one to recommend bleach to anyone...
Just curious. Why would you not recommend it?
Okay, I think the horse is dead and it is being thoroughly beat. Just my one cent.