Well im sad to say, but after 4 1/2 years of our above the ground pool, we have serious rust issues on the pool walls. I had recently noticed a pin hole on the outerside of the pool wall, and a streak of rust where the water was dripping from, so I assumed I might have done it with the weedeater. After further research, I ran my hand on the entire pool liner, and felt a lot of rough spots on the entire pool. I could push on the spots and feel a crunchy feeling, so now I know I have a serious rust problem. Im also noticing some blistering on one side of the outside pool wall, and they too were mushy, and full of moisture. With this being said, im very disappointed that my four year old Doughboy pool is probably ruined due to rust. I find this unacceptable, but I know it's going to be money down the drain. I put this above the ground pool in, and extensive decking, just so I could pay for it with cash, and not have a 20yr pool note, but now im wondering if I should have sprung for a inground pool after all. I could just go out and buy a new pool, but am I going to be replacing a pool every 4-5 yrs???? Very un-happy at the moment, for we live to be in our pool all summer. Now I have to think about safety issues...