I have been reading different posts all summer and have finally decided to start one. First, I want to thank you for teaching me how to have crystal clear water all summer. I just wish I had found this site before we set up our pool.
I was wondering if anyone could tell me what they think happened to our liner. I noticed it about two weeks after we were up and running. There are areas like the picture all over the pool.
After we set up our pool in May, a friend told us how to balance our water and gave us a 5 lb bottle of powder shock (have no idea what type it was) and told us to use it before turning on the SWG. We mixed it in a five gallon bucket of water and slowly poured it in. Was told by someone else we used too much at one time. That was the first week of opening. I know you like test results, but it happened back in May when we were first balancing the water (before I found pool school). The best I can remember is the FC was 10 two days after the shock was put in and PH was 7.4.
I didn't notice the liner looking or feeling rough until after the second week. We also had some heavy flooding during the first two weeks. We have a sand based bottom with styrofoam coving. I don't know if any water got under the liner.
There is no discoloration, only rough bumpy areas. No soft spots and it is only on the floor bottom. The walls and coving feel like the liner is supposed to.
Would love to hear your thoughts on what caused this. Whenever we replace the liner, I don't want it to happen again.