Circles in liner

[Pt144]

First season with this pool. Just purchased house. No idea how old the pool or liner is. I noticed about 3 or 4 of these circles in the deep end on the walls. What is this a sign of ? Picture isn’t the best. A little windy.

 

[Texas Splash]

I can barely see one circle (I think). Any chance it may be from an old light that was removed and covered? Even then, that would only explain one circle. Unless there were multiple smaller LED type lights on the deep end wall. Otherwise I'm not sure. Really hard to tell with the ripples.

 

[Pt144]

I can barely see one circle (I think). Any chance it may be from an old light that was removed and covered? Even then, that would only explain one circle. Unless there were multiple smaller LED type lights on the deep end wall. Otherwise I'm not sure. Really hard to tell with the ripples.

Sorry, I probably should have waited until I had better pics. Definitely not from old lights. I also noticed a few triangle marks on the bottom.

 

[Texas Splash]

Yeah, that is odd. I can only imagine it's because of something on the supporting wall or material behind the liner. One day when you have to replace the liner, perhaps you'll reveal that mystery. But as long as the liner itself doesn't appear to be compromised at those circle areas, you should be fine.

 

[Pt144]

Yeah, that is odd. I can only imagine it's because of something on the supporting wall or material behind the liner. One day when you have to replace the liner, perhaps you'll reveal that mystery. But as long as the liner itself doesn't appear to be compromised at those circle areas, you should be fine.

The triangle ones at the bottom look to be about the size of a vacuum head. I could have sworn the 2 circles next to each other come and go. Maybe it was the angle I was looking at it. I guess the mystery will be solved on the next liner. Hopefully later than sooner. lol.