Thanks for the responses. Here's the full story. We started noticing water loss last July, and I called leak detection company #1. That guy messed around with us for about 2 months without finding anything (another story for another day -- but thank goodness we didn't give him a dime!), so we called leak detection company #2 around the end of August. They came out with scuba gear, and the guy came up after about 15 minutes and said he stopped counting pinholes after number 20. He said we'd have to get a new liner -- and rather than giving us a bid from his company (they also do pool installs and service), he suggested I go after the original installer. He never marked the holes.

In between leak detection companies #1 and #2, I got in there myself and tried using the patching method you guys have used. I had found one hole roughly the size of an eraser head and attempted to patch that. I also found two more in the process and did those, too. Leaking didn't stop. That's when I called leak detection #2.

Then around Thanksgiving time I went out to check the water level to see if there was any more leaking, and I saw the liner had started to come out of the coping on one end. There's roughly about a foot and a half of water in the pool, and our lowest depth is only about 4.5 feet. The liner is not ripped, but it looks like it just made a clean slip from the coping. Is that considered floating? I would think that a foot and a half of water would still be an adequate amount of water to not cause floating.

At this point, I think I'm ready to cut my losses and move on. I spent a lot of time trying to fix this myself and with the help of others, and I'm emotionally drained. I'd just like to learn more about the differences between the liner manufacturers I posted about, or are they all about the same?

And do you think the installer was feeding me a line when he said my liner floated? Don't you think there needs to be some kind of evidence such as wrinkling? I'm just trying to figure if I have some kind of recourse with this guy.