The PB came over today to install the liner in our new pool. It is an 18x43 Roman diving pool at 9.5 ft. deep. It got to be around 60 degrees today and the sun was out and only covered around 3/4 of our pool. He had 2 shop vacs going on the shallow end (Step sealed off) and it was not getting any suction for the walls of the deep end and he said he is going to bring a 3rd shop vac out tomorrow to see if that can get the deep end to seal against the wall. Also, he mentioned he really needs to find a way to warm up the liner with the temps a little lower and it is going to be cloudy tomorrow. Just curious if there are any artificial ways to warm the liner up to get some of the wrinkles out and adhere to the wall a little better. Also, I'm hoping this third shop vac works since the pool is pretty large.