Yep, I just finished the three month cycle of the tank, and turned on the skimmer yesterday...whoohoo! I usually use a sumped system, but when I specifically ordered the tank to be untempered, guess what I got...yep, a tempered glass tank, so, no holes. Poop. Ah well, the shop felt bad enough to sell me a Coralife hang on the back for a realy ridiculously low amount skimmer. I've never been a big fan of side mounted skimmers, to me, they just seemed to generate a lot of bubbles and do very little. Boy, how this skimmer has changed my mind! The photo is of skimming from just a few hours yesterday, it removed a lot of particulate matter, and was extremely easy to adjust. I know, a lot of you would dial the water level down a bit, but I would rather get some excess water in the cup than have that goo in the tank. Anywho...this hangontheback skimmer really changed my mind, and I would recommend it to anyone out there with cuttles or fish. I don't know if it would work out well for an octo tank, unless you did some radical cutting on the hood of your tank.