Yeah I agree Jim. I have had the Vega now for about two months. I used t5 prior ATI bulbs. No algae at all not one bit. Switched to AI and ramped up over a month for coral acclimation. I wish I was watching the algae at that point but really didn't notice until I was ramped up fully. I turned red completely off tonight. I will let that go for a few days to a week and document change. Then try green. Then reduce intensity and over the next few months see what happens with the brown areas. I am pretty sure it is diatom bloom not cyano. It really does not have any thickness to it. It is just like a thin dis coloring.

I plan on designing my own pucks once AI makes them available. I also only have 2 fixtures and I think I need a third on my standard 90 gallon