My coralline growth has exploded. I have to scrape it off the glass weekly or it will consume the tank. I cant even see my heater anymore.
AND I'M NOT TELLING HOW I DID IT!!!
Just kidding. Seriously, I used Aragamilk, as has a friend with the same results. The stuff is designed to be a calcium supplement, and it pretty much fails in that area, but it did wonders for my coralline. Try it out, see what happens. its not a chemical so it shouldnt harm anything.