I have a 75 gallon glass non drilled saltwater tank. Right now I am running a Aquaclear 110 with a Aquaclear surface skimmer attachment. I also have but do not run a Eshopps 100h protein skimmer. I don't get enough skimmate to run it full time. The tank was start in late November 2014. Right now I have 2-Damsels 2-Clowns 2-PJ Cardinals 1-Yellow Tang 2-Emerald Crabs 2-Skunk Shrimp 2-Conks plus small CUC. Tank clarity is ok but feel like it could be better. I looking I feel like the Aquaclear maybe returning dirty water back to the tank. I am looking at the fluval G6 and the Eheim Ultra G160 Pro S 2075. I am also starting to like the Rapids pro series. Reviews online of both of these are really good or really bad. Would like to know everyone's thoughts and if there is something else I should look at.