Are pebble finishes more susceptible to yellow algae?

[mmomega]

I'm not sure. I can report back if I start to notice anything yellowing.

I have the StoneScapes MiniPebbles in Midnight Blue with the Touch of Glass + Mother of Pearl shells.

Haven't noticed any discolor yet but again it has only had water for a week.

[PoolDoc]

In general, the rougher and more porous the finish, the more algae is a problem. From least to most:

epoxy paint => fiberglass => vinyl => rubber paint => new plaster => old plaster => old rough plaster, blistered paint, etc.

How susceptible the brand name concrete finishes are is mostly a function of how rough and how porous they are. A very, very important point to consider: with almost all concrete finishes, the roughness and porousness usually is affected more by the contractor's craftsmanship, than by the particular brand of the finish!