Review on Sun2Solar Clear 10-Foot-By-16-Foot Rectangle Solar Cover 1200 Series Heat Retaining Blanket For In-Ground And Above-Ground Rectangular Swimming Pools Use Sun To Heat Pool Bubble-Side Down by Bob Roberts

Update: So this lasted 2 1/2 season. It was fine up to 2 summer.about 1/2 way on the third summer, bubbles started to disintegrate and finally the cover ripped. I did keep the cover on during the day time on 3rd summer which caused algae bloom. Learned that the hard way and should uncover it in the morning from now on. 2nd cover so far and these cover don't seems to make it over 3 years. I use a pool reel and do put them away after swim season.I had 14 mil for my cover before and used it for 3 years before I decided it needed to be replaced. I accidentally purchased a wrong size (bit smaller) that the 14 min left a bit of gap toward edge of the pool, but it was able to get the temperature above 90 if I kept the cover on for a week during summer.I decided to give 12 mil a try since it was bit cheaper, and to test out the insulation. I did get correct size and trimmed away to make it fit my pool. I put it on the reel right away to make it easier to cover and uncover. Per a recommendation, I attached retractable dog leash on one side for covering of the pool for end of the night when it retracts to covers the pool (sort of). The cover extends the swim season by warming up the pool before summer starts and keeping it warm toward the end of the season. I did notice some difference between 12 mil and 14 mil cover. Mainly weight and temperature.14 mil is definitely heavier. But it puts more weight on the reel and heavier when pulling it to cover the pool.14 mil keeps the temperature warmer. In So Cal, when 14 mil covers the pool for a few days it'll raiser the temperature quickly. Keep it on for a week, it'll raise the temperature of the water to 90 degrees and possibly warmer if I kept it on longer. There were nights when I left the cover off since the water was too warm and needed to be cooled off. I left the cover on during and after a rain. With warmth and not mixing with chlorinated water, I had an algae bloom that started on the cover and spread. Lesson learned, take cover off after a rain.12 mil I've kept the cover on for a week and it hasn't quite reached 90 degrees. But I am able to keep the cover on for days when I'm not using the pool and not having to worry about getting too warm to swim.So for me I do like 12 mil better since I do not have to keep covering and uncovering on days I don't swim, but 14mil may be useful for people in bit cooler climate.14 or 12 mil, I would highly recommend getting a solar blanket. Even in Southern California summer, water is still pretty cold (some where in 70's) but the blanket will make it much more enjoyable for everyone.I'll be more diligent in putting away the pool cover after summer to see if that will stretch the life of the cover and write a follow up