I have been slowly lowering my TA but it is still high ~200. Right now I am adding MA about every 3-4 days to drop pH to 7.2 and letting it creep up. I am going on vacation in a few weeks and have someone arranged to check the water and add bleach daily but I don't want to ask that person to add MA.
My question is, what harm will possibly be done to people, the water, or the pool itself if the pH is > 7.8 for a couple days? I don't think I have metals in my water. Is calcium staining an issue with vinyl walls??