The past 2 years I have opened my pool in mid-April only to find that my chlorine level was 0 and the water was very cloudy. I could only see down about 3 feet. This season, in an effort to avoid this happening for a 3rd year and add some liquid chlorine bleach if needed, I opened the auto cover to find that the liner is not tight against the pool walls and is sagging although still hooked on the bead. Winter closing I lower water to 2" below skimmer, add a winterizing kit, winterize all plumbing and close. Since this is the first time I've ever pulled back the cover before the water temperature hit 70 degrees, I wasn't sure if this is normal. The current water temperature right now is 40 degrees and crystal clear with a PH of 7.5 and Chlorine level holding at 10. I'm concerned that when it starts warming up the liner might start to wrinkle. Any help is highly appreciated.
Pool is inground 16X32 with 8' deep end