And, one more note. It came up in the private support team section that I didn't warn you that high chlorine may lighten your liner. It is possible that that will happen.

In cases like yours, there is not a perfect answer I can think of:
1. Super high free chlorine offers some risk of liner bleaching, and definite risk of swimsuit bleaching, and can leave lingering very high chlorine levels which is hard on fashion swimwear.

2. Unstabilized halogen residual, via sodium bromide, can led to high to very high chlorine consumption in the weeks following.

3. Use of ammonium chloride (Yellow Out) would require letting your chlorine drop (and the problem get worse!) before starting treatment, and will render the pool unusable for a week or more, with lingering irritant chloramine residuals. (Been there; done that; had the pool user complaints!) Unlike free chlorine, monochloramine sensitization does seem to occur, and apparently results in some pretty severe effects, even at drinking water levels of MC.

4. Drain and refill, which can damage your liner, and force you to get a new one
Supplemental algaecides aren't really compatible with chlorine levels like this.