This project's specs called for (no water),only latex acrylic additive, when mixing regular thinset mortar (gray), however, we used white thinset for the pool floor, to eliminate any possibility of a white grouting problem.
We had to do a pull test on the tile inside the pool,4-5 days after the tile was installed,pullman was cranking on his pull machine, I heard something snap, he said his machine was broke, I said, I guess they're stuck,good.