Odd leak story.
For the past several year or so the water level in my in-ground gunite pool will occassionally drop 3 inchs over night.
Sometimes this continues for a while.
Not worse during the day so I don't think this is related to the discharge side.
I've let the water level drop to see where it stops.
The water continues to drop below the skimmer so I don't think the problem is in the suction line.
I've packed the lamp fitting with epoxy and used dye at all the jets looking for a leak, etc.
I thought about using an ultrasonic dectector but the leak seems to stop by itself after a few days, making it hard to continue testing.
Any hint as to where my leak might be or how better to find it?
TIA.
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