I have the same green growing in my tank, about a month and half ago I had a problem when I added homemade LR to soon wiped out almost all of my pink/purple coraline. Now I have green growing everywhere definitely coraline hopefully it will turn pink/purple. My current lighting is 2 URI NO super actinic, 1 URI VHOwhite actinic, and 1 URI VHO super actinic