I have confirmed my inground gunite pool is leaking. Lost almost an inch each of the last 2 days. 1st night I noticed the major drop, I turned the pumps off and let it sit 24 hours. No noticeable drop happened. Last night I filled it back up and ran the pumps at night, lost close to an inch. When I got the pumps running last night, I went to the front of the house where I assume it drains when I backflush (goose neck pvc into an open pvc pipe) and didn't see a drop of water falling. I don't know where the water could be going. There is a plug after the valve for the backflush so I took that out today turned the pumps on and no water coming out, see picture.
I don't know where else that water could go, the yard isn't wet at all.
A separate question, I'm not sure how to work the valves in my pool. I have an attached spa and waterfall. I tried to isolate the skimmers by closing the valves on the bottom, that didn't seem to work.