D
Deleted member 24321
I have it on my back wall and on one or two rocks. My phosphates are 0. I had recently bought a hanna meter. I figured the Phos would have been 2 but not the case. I did buy a tuxedo urchin and he's going to town on it. I keep him on the back wall. I have a 180 so I'm going to get a few more to do the clean up. If he manages to get on the rocks I just move him back. Not sure if this will keep it from coming back but we'll see