Hello, We studied the SGM mixture possibilities for River Rok and came up with a 10 bag mixture of 7 bags Lucayan Blue and 3 bags of Emerald Black. This was decided because we wanted a very blue, on the darker side color. We do not want this green, lagoonish type color. We spoke with SGM tech support and they reinforced our decision to go between Blue Opal and Baha Sand, which should result in a very blue pool. We watched the mixing process, and everything appeared right, but the pool has come out green, not blue! The water is very clear and it does not appear that the water chemistry is an issue as testing shows normal, new pool numbers, with low alkalinity and low sequestering factor. It appears that algae is not an issue. It has been a week now and the clear water is circulating well. We had SGM out and they have no answer for us yet. The point is that any combination of Lucayan Blue and Emerald Black should result in some type of blue color, not green. Even if we used 100% Emerald Black, it should still be blue. Can any one give us some insight into this problem?