It's quite possible you are bleaching the chalices, depending on your Kessil settings. Reburn and I just spent saturday measuring PAR of our Kessil A360WEs in each of our tanks. We identified a sweet spot in his tank where some acros seemed to be doing well. This spot surprisingly measured at 87 PAR using SAMs meter. It's no wonder I was bleaching things as I was trying to get mine up to a PAR of 300-400. The meters just really don't seem to read the Kessils well at all. I'm currently at 43% intensity and 60% color at the peak of a 10 hour parabolic curve. I'm 7" over the water and it's about 22.5" to the sandbed from there. This gives me about 100 PAR by the meter at about top dead center in the water.