Green Coraline

I got the same stuff as steve, and its definitely coralline in its behavior and structure. It's covered a major portion of my back glass and rocks, even unfortunately taken over some purple parts. No matter how many purple pieces of LR I've tried to introduce to then tank over time, the green has prevailed. I don't want to scrape it off either lest its spread even more so I scrape my purples in hope for it to spread w/ no success causing me to have yet even less purple lol. I may just give the purple up stuff a shot or maybe order some garf grunge to seed some different spores maybe. I've read it has to do with spectrum or intensity possibly. I had it start when using hamilton 14k's and now im using reeflux 10k's but there is no change.