Hey everyone. I have a question. We have had this pool for about 3 years and maybe I never noticed it, but in the deep end where the main drain is located, there is a few small wrinkles in the vermiculite. I think thats what you call it? Its the stuff that is trowled over the liner. Its not concrete so I think its called vermiculite.
Anyway, this liner is 7 years old. In very good shape and was installed by the pool owner at that time. They did a very good job. My question is when I dive down to the bottom and put a little pressure with my finger on it, I know its a wrinkle/air behind it. Liner is totally not leaking any kind of water whatsoever.
In my opinion, I doubt I can do anything about it at this point but to not mess with it either than when I vacuum lightly over top of it. I am pretty sure its always been there as the bottom of this 40 year old cement pool is cracked and when they preped the bottom, they should have put a cement layer first to smooth it out as you can see cracks from the cement under the liner. Looks like there was foam applied properly to pretect the liner and we do not have ground water issues, however it has been really wet this year. We do have a sump pump that runs on the house but the previous pool owners told me they have never had a problem with the pool. Like I said, its a 40 year old pool.
Up here in ND, the ground does move which is why cement pools and even plaster pools dont work that well. At least with vinyl liners, it does stretch and move a bit which is what I think happened in this case as I am sure the owners before didnt have that issue. Its in the very bottom at the deep 8' end.
In my opinion, I guess if its not broke then leave it alone. I just will continue to keep an eye on it. The ground may shift back when the winter time approaches and the ground freezes again. Maybe not. It might just be the way it is until I replace the liner. For now, my plan is to hope I get another 5 years out of this liner before I need to replace it.
All chems are perfectly in line. I have the TF100 and have not had an algae issue in over 2 years. I actually had a little algae on the pool walls last night because its been so hot, so I added a bit more chlorine and brushed the walls. I left it run overnight and FC was 7.5 and this morning when I tested it, it was 7.5 so I know its good to go thanks to Dave's, handy dandy TF100 test kit
So give me your thoughts on this one. Tell me what you all think. Maybe I am just overreacting on this, but it tics me off to see those wrinkles that I know I will never be able to move/smooth out.