New endless pool user water treatment

[waterbear]

Yes, I meant persulfate, it was a typo. There have been reported cases of allergic reations to denture cleaners (which are basically MPS) which the FDA has issued alerts on, and also people that have problems in bromine santized spas where MPS is the primary oxidizer. Also, ammonium persulfate used in hair bleach can cause allergic reactions including asthma so it seems the persulfates as a group are allergic sensitizers (have had actual experience with this since I am a licensed barber and cosmetologist for going on 40 years now and worked most of that professional career as a colorist and instructor, and although I have not worked in a salon or barber/beauty school for about 15 years now I keep both licenses current and active and take contiuining education courses in both fields to stay current.)

It would seem logical that there would be cross sensitization among the various persulfates since that does occur with other allergens but I do not know for sure.

[Proth]

Thanks to everyone for all the advice.
We ended up draining our pool, and refilling it.
We are now using a nature 2 cartridge, and will leave the free chlorine level to 0.5 ppm as recommended by endless pool. We also have a UV filter.
I understand that most people are actually allergic to the Chloramine.
I was a swimmer for 15 years, and I spent about 4 hours a day in a pool. I always had a stuffed up nose because of some kind of allergic reaction. Most likely to Chloramine which back in the 70s and 80s must have been out of control in public pools.
Thanks again for your insight in all of this!

[PoolDoc]

If you swam for 15 years, up to 4 hours per day, you must have been pretty good!

My sons (16 and 25) both swim, but my 16 year old saw what my 25 year old went through, and decided that was not for him. So, they both swim Masters. They're trying to get back into the routine, which got 'busted' when the 25 year old got married in November. They swam this morning, and both were dead after. Of course, the Master's group in Chattanooga includes some former almost Olympians, so it's a pretty fast bunch.

But . . . the situation in the 70's is the reverse of what you think.

The old pools mostly had 100% outside air on their heating system, whereas in the late 80's newer 'better' pools were built with recirculating dehumidification systems that trapped the volatile chlorinated organics inside the natatorium. My 25 year old was a distance swimmer AND an asthmatic -- his best mile times ALL came on OLD indoor pools. I think his all-time best mile was at the OLD UT-Knoxville pool. He swam there the year before they opened the new one. And, he never had good times in the 'state of the art' Tracy Caulkins pool in Nashville. In fact, we finally gave up on the multi-day championship meets held at that pool. As you know, the distance swims are often scheduled last, and by then the air was so bad he was just wasting the effort.

Regarding Nature2 -- watch out for their recommendations to use MPS. As noted by Waterbear, that stuff DOES trigger reactions in quite a few people.