We've had ours (I think it's actually called Chattahoochee River Rock) and love it. Even though the pebbles are coated with epoxy, there's room between them for water drainage, assuming it's correctly installed. We haven't noticed any fading, whitening, etc. even though it's a direct Western exposure. Apologies that I'm not in TV right now to look up our contractor's name, etc.
We were going to use CoolTech (like you'll see on the lanai ceilings and Premier homes with finished lanais) but our neighbor is constantly cleaning his because water puddles in every one of the low points.
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