When I first saw bits and pieces of the coraline algae I was pleased. Now, its growing on the walls, on the sand, its everywhere. I do water changes weekly, and am just scraping up this purple stuff a little each day. I don't mind a little but its getting out of control. It is also growing around my toadstool corals on the rock. I think it looks kind of pretty but it will take over right? I'll send a couple of pics. Should I be doing something else to stop this?