Opened pool - lost half my water!

[Dave_NJ]

So today I took the cover off my in-ground pool only to discover about half to two-thirds of the water is missing.

The new water level doesn't align with any jets, skimmer or pool light cut-outs so I'm wondering if there is a hole in the liner somewhere. I'm just surprised that around 10k gallons of water drained out but the surrounding ground never shower excess pooling or other signs of draining.

I had the liner replaced about nine months ago so I contacted them first to get their opinion and hopefully figure out what's going on.

Besides a leak is there any other way the water could get out? I have a main drain but that was blown out and the three-way valve was closed, only other thing I could think of is if somehow the waste line from the drain has a crack at a point where the pipe turns up on the way back to the pump but that seems like a stretch.

The liner is still attached but there are wrinkles in the shallow end since the water level is so low, need to get those sorted before I start refilling.

Any other suggestions are more than welcome, this is the first time I'm dealing with a problem like this.

 

[PoolStored]

Look for holes in the liner at the waterline. It stops where the leak occurs.

 

[Dave_NJ]

That's what I figured. I didn't see any obvious holes in the shallow end when walking around and it was too cold to jump in the deep end and do a thorough inspection.

I don't see any large tears or rips so if there is a hole it has to be relatively small.

 

[ajw22]

Mark the water level with some tape.

Fill the pool up an inch or two from the mark.

See if the water level drops back down to the tape.