Wrinkle in deep end in liner

[superburg]

i test almost daily and ph has been between 7 - 7.6. could it have happened over the winter when chemicals were way off, it has been there but I am not sure if it has gotten worse or not and not sure if I should be concerned about it or not - thanks

[Watermom]

Do you know what your pH reading was when you opened the pool up this spring?