OK, well thanks to everyone for the info. On that thought then, with a 46 gallon, do I really need a skimmer? I have the sump/refugium going and I also have a HOT magnum although when everything is running well I am hoping to lose the HOT magnum. I also have a UV going so how much is too much?
There is a debate between skimmer or skimmerless.. i can tell you i use to (over) skim 24/7 and it resulted in very dull colors (sps).. basically i was starving my corals b/c there was nothing in the water column.. i tested shutting down the skimmer for 3 weeks and over fed during that time and the colors came back.. now i skim 24/7, but not as aggressive/wet as before..
also keep in mind the bio load of your tank.. if it's light, you may not need one.. but if it's packed, that's another story.