Leaking somewhere

[Punchyp]

Ive been in denial but i lost 3/4" of water in 24 hrs with the solar blanket on so i dont think it evaporated.
I can see a weid looking spot on the bottom of pool liner. (Rust colored spot the size of a fingernail) Could that little spot lose 500 gallons in 24 hrs? How do i truobleshoot this if its in plumbing? No visible signs of wetness anywhere.

 

[AndyTN]

Get your snorkel and mask ready. Get some food coloring and with the pump turned off, dive down and squirt a little near the spot to see if it gets sucked into it. I just had a leak losing over an inch of water per day which took me 3 weeks to find a cut about half an inch long. The cut was due to me brushing too hard and that tiny thing was sucking in the red food coloring as fast as I could squirt it out.

Be patient with a leak because it is usually not the first 5 areas you suspect. Unless you have a pool party in a few days, don't add any water and let the water level keep falling as a way to determine if it is any place in the top 2-3 feet. To rule out plumbing/equipment, you can put your caps on your returns and leave the pump off for 12+ hours to see if the water level still drops at the same rate.

With a vinyl liner, odds are that there will be a small hole at a seam or on an edge of the floor. Small holes in vinyl are very common but also very easy to patch once you have found them.

 

[Andrew Howard]

Ive been in denial but i lost 3/4" of water in 24 hrs with the solar blanket on so i dont think it evaporated.
I can see a weid looking spot on the bottom of pool liner. (Rust colored spot the size of a fingernail) Could that little spot lose 500 gallons in 24 hrs? How do i truobleshoot this if its in plumbing? No visible signs of wetness anywhere.

I’ve had two companies out who can’t find anything. Waiting formwater to warm up a little more before I do my own inspection.