Our pool just reached a nice temp to start swimming and we are getting itching rashes after swimming. No raised bumps, just pink itching rash.

Chlorine is a little high, which has never caused a problem in the past, and pH was high but is now corrected with muriatic acid.

After closing the pool last fall I had an algae flare up and used a new (to me) algaecide from Home Depot. I didn't keep the details, but it was $50 and 2 small bottles to treat a 27,000 gal. pool and did kill the algae as never before.

Otherwise I only add liquid chlorine or muriatic acid.