Is Muriatic acid bad for plaster?
Is shock bad for plaster?
So I had mustard algae, and my ph was high at an 8. So I was advised to over shock even though my chlorine level was already too high, and add enough muriatic acid to bring my pool to a 7.2. So I added a couple bags of shock and half a gallon of muriatic acid in the deep end. My pool is 10 ft deep and 1500 or 1500 gallons. I don't remember which, it's pretty big. I scrubbed the walls, vacuumed, and ran the pump. After 4 hours is was at a 7.6 so I added the rest. 4 hours later I tested again and it was 7.2. I ran the pump for 2 days for 24 hours before returning to 12 hours a day. After 7 days I saw no algae return so I was happy. But when I went to clean the pool there was still shock on the plaster. But the chlorine levels were low. I put some tablets in the floater because I am worried about the plaster.
So is Shock or muriatic acid bad for plaster? Did I do damage?