The surface upon initial look, appears to be the new micro glass pebble sheen surface, but that is only because of a stain that is present; likely a copper or metal stain due to the metal heat exchanger (of the heater) has failed and then coated the entire surface
with that metal giving the surface here a beautiful unique blue hue. (I have to be honest and say that upon initially walking into the backyard, I couldn’t believe how beautiful the surface looked, and it was only upon very very close investigation, that I noticed that the surface color can be linked to a metal contaminant in the water likely from a heater core) This type of issue is rare but is generally caused by super over chlorinating the pool for A period of time.
It is likely the surface is a light blue / sand / brown color underneath, as there are approximately 1 to 5% of the pool un colored (you almost can’t tell).
It may be possible to remove this discoloration with an Acid Wash ($750+), but that service will shorten the life expectancy of the surface and at this time I do not recommend that unless other issues develop as a result of the excess metals present on the surface of the pool.
Surface age is 4-5 years old. Typical life of plaster (pebble) is up to 30 years.
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