A while back I posted a question about my PB putting gravel rocks, on the bottom of my pool on one side of the shallow end and then putting the pool krete on top. PB said it would help smooth out bottom just like you put gravel under concrete. I wondered if that was right because everything I read said bottom should be smooth and free of all rocks. So after a big rain storm my pool got big wrinkles then it got BIG ridges where the pool krete has broken and shifted up, some of the ridges are 3 or more inches high. This is all where the gravel and pool krete are. Service manager said he never seen anything like this! Eveyone on vacation this week, so next week they have to come back and take out liner and redo bottom of pool. I think I was right when I wondered what the heck the PB was doing. Now I wonder if the liner isnt damaged from all the stress on it. Still havent got a deck around it yet, that is coming tomorrow.