i can't find a leak on a gunite pool, I presure tested all the lines and MD, and the presure never dropped or changed. the customer is loosing about an inch a day or more and the equip pad always has standing water around it.

If the equipment pad is above the water level in the pool and your confident the pressure test is good,leave the equipment off for a day and maybe do the bucket test. If the water level in the pool holds, the leak is at the pad, if not the leak is in the pool. Process of elimination. Is there any other reason for standing water at the pad ?

we had one that turned out to be the bottom of the filter to check you need to pressure test the filter