Just bought another skimmer one for my 24 gal nano cube reef They are a great hang on back skimmer, very powerful and I have tried many others and I like these so much I bought another one for my new tank setup same size tank, I tried the Hydor Slim Skim and the thing is to tall for my tank cant get the water level right, and it also takes up so much space in the tank, and it appears to be weak compared to the Aqua C Remora S. I am just using surface skimming, live rock, and a good protein skimmer for filtration, simple setup. And my tank has been running for a year and my sps corals are doing great. Oh I also have a bag of carbon in the rear chamber and I have a phosban 150 reactor with a little gfo. Anyone else love there Remora S skimmer. If you have the old one I would highly recommend switching to a Cobalt pump.