Hey I noticed your comment about coraline algae growth in cody's thread. I have been really lucky with my coraline growth and thought I might offer you a few tips. First if you can get a rock from someone else or one in your tank thats got nice growth on it and then, while submersed in your tank, scrub it with a hard bristled brush or even rub another rock on it to break up the growth. This will "seed" your tank with the algae and hopefully it will take off from there. Also, I know not everyone will agree with this, but I add strontium supplement to my tanks to help the calcerouse algaes.