Leak- Losing 3" a day

[ellry99]

I had a pool guy out today.

He said I am losing water so fast (8-12" /day) he thinks that the hydrostatic plug rather than a leak in a pipe/drain. My water level is down about 4 feet. He thinks the hydrostatic plug may be stuck open that a normal leak wouldn't be so fast. He also said main drain leaks are usually as low as mine has gone.

Does this make sense as a possiblity?