losing water

[bcpoolowner]

I have been having an ongoing problem losing water. Over the winter, the water fell way below the skimmer and the return, so I know the leak is not there. Is there a way to find a leak in the liner that is not noticeable to me (ie, not bubbles, etc. to signify water leaking/air getting in).

Pool AG 27'

[bkwudz]

We had the same problem, two years in a row we lost almost half the water over the winter. Looked for the leak all last summer with no luck. There is lots of good info on here for finding leaks but none of it worked for me. This years i said screw it and decided to just replace to liner, first to fix the leak and second to see where it was. To my surprise the leak i have been searching for was not one, but many small, very small ones all around the cove, i would have never found them i had not gone under the liner after i emptied the pool. I was convinced my leak was within inches of the water line in in fact it was no where near it.

I think the tell tale sign of one many small leaks vs a few larger ones is the fact that my pool look like it was loosing water, then the next week it would seem to loose none or very little. I think this was caused by my many small leaks getting plugged up by debris and sand, then after a good day of swimming, the water would get mixed up and the holes would open. If i had had larger leaks, i bet my water loss would have been more steady.

[NWMNMom]

Leak detection is incredibly difficult unless you can track it to one specific incident (something gouging the liner, etc) There are some products on the market and a good search of this site and the TFP site will probably give you some insite on what others have done. A lot of the time they end up just biting the bullet and getting a new liner.

[matt4x4]

Whatever depth you lost water to over the winter is approximately the height where you want to start looking - from that point to 2" down - concentrate around the area of your stairs because they see the most use and sometimes, drop in steps (if you have them) can do damage when you remove or install them without you knowing it.

[matt4x4]

holes tend to look like dark spots - or possibly like a sliver of finger nail stuck to the liner

[hoffmans]

bkwudz-
What kind of cove do you have? Sand or Foam?

~Hoffmans