Well I have a problem with my liner floating. I originally found one wrinkle in the liner after a heavy rain when I had unplugged the sump pump and forgot to plug it back in. At the time i could feel there was water behind the liner at the bottom of the deep end where it slopes 45 up to the steel wall. I hoped that it would drain but after a few weeks it seemed it would not. I knew I would have to suck out the water behind the liner but was so busy at work I have not had a chance to do it. The one wrinkle in the liner remained and I was going to pull it out with a plunger but again never got around to it. Since that time it has been pretty dry with almost no rain. I went from one wrinkle in the liner tight to the pool floor to now having the liner floating badly in the shallow and deep end in one day with no rain. I can feel water behind the liner almost up to the water line inside the pool. I have had to add more water to the pool this year than I remember adding last year so I think I have a leak in the liner somewhere. It is not leaking a lot maybe 1 inch a week or so. I thought it might have been evaporation as I like to keep the pool up to 90 and the outside air has cooled off at night and I can see a lot of steam coming off the pool. When I had the pool cooler and used the solar blanket there did not seem to be much water loss at all. I do have a sump pump keeping the under side of the pool void of water and when I look in the well point indeed the water level is below the deep end of the pool so it can't be ground water causing the liner to float. I am amazed that the level of the water behind the liner is as high as it is. I would have thought it would have found a way out between the steel panels or where the concrete and vermiculite meet the bottom of the steel wall. I know there is duct tape over the seams in the steel wall but I would not have thought it would be a water tight seal. Also I would have thought that the water would have drained through the bottom of the steel wall where the pool bottom meets the wall.
The bottom of the pool is about 3 to 4 inches of concrete with about an inch or so of vermiculite on top. There is about a 6" ring beam of concrete around the bottom of the steel wall outside the pool. Maybe that it causing a water tight seal stoping the water from escaping.
Here is what I thought of doing for a short term fix till the end of the season:
Find leak and seal it.
Remove some of the bead lock and suck the water out from behind the liner and push and pull out any remaining wrinkles in the liner.
Now what I thought I would do to make sure this wouldn't happen again would be to drain the pool and pull back some of the liner in the deep end between where the liner is attached to the wall at the skimmer around to where it is attached to the light niche. Obviously I don't want to remove the screws from the light niche or the skimmer but this is my longest unobstructed span of liner. Then I thought I would climb in the pool and drill some 3/8 or 1/2 holes through the vermiculite and concrete around the radius of the deep end right where the bottom of the pool slopes 45 deg. up to the pool wall. My thinking is that since the liner did not touch that part of the floor the water would have a chance to drain out into the limestone beneath the pool and into the sump system and pumped out with the rest of the ground water. Also if ground water did come up and get behind the liner when the level dropped it would be able to drain.
Would this work or is it a bad idea?
Any other suggestions would be greatly appreciated.
Thanks in advance,