A little update. The goby is not as active as he used to be and is still breathing heavily. My big feather duster crown looks a little like string but he is still alive. A quick question, could I put fish in here or do I have to do a 100% water change to put new fish in? Thanks for the help. I have decided that I will do as I did before and make it a community tank and I will make a reef out of it. I was looking into fuval sea's new skimmer and wanting to know if anyone has seen it and how well it works. I do not want to pay over $100 for a skimmer.