Wondering if you've had any luck with improving the tangling situation. Hoping that you have and that you can share your solutions.
Last year I had no trouble with it at all. I used BBB last year and also this year. Both daughters have long hair. One (E) has very thick, wavy hair that goes past her bum. The other's (K) hair is finer and straighter and a little shorter. E's hair has been approaching dread locks when she gets out of the pool. I truly thought I'd have to cut a foot off of it one evening. Took over 45 minutes with the rat-tail part of a teasing comb to get all the knots out. Back again the next evening. K gets dread-like mats too, but not as many.
Couple thoughts to account for differences from last year: 1. hair longer; 2. hair down in pool now (last year often kept in bun on top of head and they didn't put heads under last year; 3. use an inflatable ring that goes around chest this year -- wondering if hair is getting rubbed between their backs and the tube and creating these awful mats - although I've tried to watch to see if that is happening and it always look like there is a big gap in back and that hair is flowing freely.
I really only test FC, CC, pH, and CYA, so don't know if other things like TA or CH would matter in this equation. FC is always within or at most 1 or 2 FC over target range. CC always 0 to .5. pH always 7.5ish (hard for me to distinguish well on the color match tests). CYA is about 35.
It is impractical to rinse their hair after getting out of the pool each time because they don't like showers or rinsing their hair and also because we are in and out of the pool all day. Personally I don't rinse my hair either -- I just wait til next morning's shower. My hair, which is only shoulder length, does not have tangles at all. I did braid E's hair yesterday and that seemed to help, but I haven't given that a full test since we only swam a short time (and only once) yesterday so I haven't tried it over the course of a long swimming day. I will braid it again, however, and also start spraying down with conditioner/water as suggested in this thread to see if that helps. If not, might try to buy some of the neutralizing shampoos (and conditioners?) that are mentioned on other threads on TFP. Yesterday I added salt to the pool to see if that helps, but it has been raining ever since so not able to test it yet.
Thanks for starting this topic -- until it started happening to my girls, I couldn't have imagined such terrible knots just from swimming!