Hello and thanks for reading,

Opened my pool to discover all the water (sans deep end) has disappeared.  Must be a leak somewhere, but based on where the water has stablized, the leak is below the typical culprits (skimmer, return jets, light niche, steps, etc.) Could it be the main drain? Or perhaps in the pipes underground? I'm having some folks come out to investigate (pool pros) but I'm trying to satisfy my own curiosity and just wondering what others might think.  Has anyone seen this situation before and what was the solution.  Thanks!

Pool deep end water stabilized