The liner should not float at all. The pressure or weight of the water is what holds it down. There has to be either a leak where water is getting under or behind it or maybe ground water is forcing it up. This is sometimesa problem in the southern states where the water table is closer to the ground surface.
Garret Vinyl Pools Inc. 281-855-7000
Inground vinyl is better, their is less exposed part to the oxigene, therefore, last longer.
Beautiful and cute print vinyl pool liners are available aplenty online. You check up at any of these sites that sell a variety of vinyl pool liner: http://www.poolwarehouse.com/inground-pool-liners.html; http://www.pooldeals.com/catalog/Pool-Liners-p-1-c-314.html; http://www.websweeper.com/php/pool_section/pool.php AND http://www.bizrate.com/swimming-pools-jacuzzis/pool-liner/
We used Garrett Vinyl Pools they have been around for years.
An inground pool is typically lined with either gunite (concrete), fiberglass, or vinyl. Gunite and fiberglass are roughly the same cost, whereas vinyl is considerably cheaper. With the lower price comes less durability, as vinyl lining has to be replaced every 8-10 years or so, whereas the other two can last for decades. Vinyl is also much easier to puncture or otherwise damage. That said, many people still prefer vinyl inground pools due to the lower cost.
what you can do in this situation depends on what is under the vinyl liner now.
thousands of dollars
Not all pools have pool liners, some are simply painted concrete. Depends upon your type of pool. If you are concerned with longivity, then consider a thicker vinyl.
Need to rephrase question.
It is highly unlikely.
See this link: http://www.backyardcitypools.com/vinyl-pool-liners/Mil-Vs-Gauge.htm
No. Replace the liner.