I am not sure about other corals. There is some xenia in the vicinity but I was more concerned with the hammer hurting them. There is a goniopora, a leather, some shrooms
, some zoos. The only thing in reach is the xenia.
About the carbon, I only run a small filter in my sump that has a poly/carbon filter. I change that about once a month. When people say they use GAC
what exactly are they talking about. I hope that isn't a stupid question.
I am running a CPR bakpak skimmer in my sump and it seem to collect very well. I have only one ph in the main and then use the return from sump for circulation.