This is my second summer with a pool, and I had a pool company open the pool, although I've been balancing everything else myself. They added an algaecide, and I noticed my daughter's hair turning green, and a few copper spots on the lining. The pH has been a little low, too (starting at 6.8 and now at 7.3 after a week of rain), and I'm wondering if it's combination of both, or just the pH. The previous owner of the house trashed the copper coil heater from not raising the pH, and after paying $$$ to fix the heater, I'm terrified of doing that again. I read through the pages here on adding borax to the pool, but I'm hoping someone can guide me as it's my first time, and I'm a bit nervous. I've read if my pH is low, I shouldn't add the borax all at once, but slowly over time. Is that true? And, do I have to add Muriatic acid along with it? Is it okay to swim in the pool after adding it? My pool is really small, and I've over-added things in the past (thanks to the pool store suggestions, which I don't go to anymore), so any guidance would be appreciated! Thank you.
Here are my levels this morning:
TA-70 (this was at 110 at the beginning of the month, but has since dropped - we've had tons of rain and I've had to backwash more than usual, and back up with hose water)