Coraline algae growth? how can I help it along

[Canadian Man]

Well Steve, For the past 2 years on my 90g, lit with Iwasaki's. I could never get corraline to grow. I was running a reactor, levels were good. Put corraline covered rock's into the tank and the corraline would dissappear.

Now with the 230. I have Lot's of light over the tank but I ditched the Iwasaki's. I now have the radiums (400w) times 2 and sun aquatics 10K (250w) times 2. My corraline is starting to show up. It's not a deep purple but more of a light pink.

Anyway, I want to change the 10k bulbs to a more blue bulb soon. At that point I bet I can expect more corraline to show up.