Skimmers and Sterilizers and Volume - Oh MY!

First a word on the sterilizers. Most people don't get one that is powerful enough to kill larger parasites like ich, even though they may think so. And even if they do, they have to keep a slow flow through it to accomplish that goal. That being said, they are also not an effective way to rid a tank of any sort of parasitic infestation, so don't rely on them to do so. What they are effective at doing is killing bacteria and algal cells that can cloud the water and they also destroy various organic compounds (this is a good thing). On the other hand, some of these things, like bacteria, serve as a vital source of plankton for many corals and are an important part of their diet. This is where most of the controversy comes in--that it kills vital plankton. I have not found their use necessary at all for a successful tank. I feel that it is really another superfluous piece of equipment whose role can be replaced easily and more effectively by proper husbandry, quarantining, and the use of carbon (or other organic removing media).

OK, now that I am off my soapbox, on to skimmers. I recommend you look into a few brands. Reef Octopus (good bang for buck, so to speak), Orca custom skimmers, Euroreef (pricey), Deltec and H&S (pricier), among others. I usually recommend that people look into the Reef Octopus skimmers first, especially for a first skimmer. They are effective (unlike some other options) and they won't break the bank. They can help with success without leaving you feeling gyped. In general, I prefer needlewheel type recirculating skimmers. I have had the best luck with these, myself. I would include sump volume. When it comes to skimmers, that shouldn't matter. You should be oversizing the skimmer anyway, since pretty much all manufacturers overstate recommendations. I'd go for at least double, if possible.

Amp has given you excellent advice, welcome to the world of saltwater.

Out of the two, ASM is better by far. I still prefer the above brands to ASM, though.

That is the same brand and that model is ok, but I prefer the recirculating models in terms of performance. That particular one isn't a recirc.

A couple of lfs recommended Reef Octopus wich they had on ther tanks and seem to be doing a very good job so i got one but have not set up my tank yet,will let eevery know when it is up and running.