I have an empty 100 gallon saltwater tank that has been running with an overflow sump for about 6 months now. I also have a 12G saltwater. I only have a carpet anemone and a couple of duncan coral frags. I am wanting to transfer them from the 12G to the 100 gallon. Also, I am considering getting an FX6, but not sure about a protein skimmer attachment. I don't think my tank can be drilled as it is a very old tank.