is the plant red, green or brown? either way as the reply preveious to this one stated, as long as your conditions in the tank are right, you will be pulling your hair out in no time trying to get rid of some of that, I have been battleing plant growth in my tank for over a year and I am just now getting control over it, at one time you coulden't even see any rock, my advise, get a refugium or sump and get it out of your main tank if you have coral and no fish to eat the plant, but if it is a plant tank you want, should be no probleam.