My pool was rerouted, all the tiles two years, and specifically all around the skimmer box was renovated.
This morning with the filtration now turned off, I have stuck some tape on the pool at where the present water mark is.
Any constructive help and advise of what steps to take in this elimination process, and how to achieve them would be greatly appreciated. 

look for bubbles? 😄

You have looked at this? Right?

https://www.aqualeisurepoolsandspas.com/inground-pool-leak-detection/

I had that problem with my pool in Dallas. Eventually they just let it leak until the water level stopped dropping. The problem there was a light fixture that was leaking. Sounds like your putting tape each day is the right way to determine the level.