Yes. From what I can tell, the Mag one is a bigger skimmer than the one that Doug has.
Upside is that you'll have a skimmer that can grow into a new tank with you. The downside is that you'll be eating up a fair chunk of interior room with a pump that's approximately 5"x4"x4" and, as mentioned, putting a fair amount of heat into the mix, too.
This is a softies tank, correct? Get a Seaclone. With a little adjustment, they're perfectly good for a fish only or softies tank.
Well, this is actually a I-dont-know-what-it's-going-to-be tank. Only 20 gals and a small sump/fuge. Looking into an in-sump skimmer if that is feasible.
This tank has actually been taken down. The drilled 20g will probably end up being the fuge for my 90g display. I'm considering a show-fuge that would sit up above a 30g sump. (Hoping Bryan can show me how he did his.)
I don't mean to offend anyone here who uses the following (they can all be successful):
For the future, I would recommend avoding:
Seaclone
Bak-Pak (or most CPR products for that matter)
Fission Nano-Skimmer
Remora
Prizm
Seaclone (aka "Seaclown"): you get exactly what you pay for it. Not too much. Bak-Pak: see Seaclone. Nano-Skimmer: see Bak-Pak. Prizm: see Nano-Skimmer. Remora: you don't get what you paid for. It's better than the others, and definitely does fine on a small tank <30G, but for the price tag it's ridiculous. You could get an Octopus NW150 for less than a Remora, and it can handle 75-100 gallons out-of-the-box. I don't know about their HOB models, but their in-sumps are good. A bit bigger than your standard HOB, too, but well worth it for their price tag. Asthetics are the only reason I would ever get something other than an Octo if I plan to spend <$200.
Linda, I have the Aqua C Remora, and I plan to hang it on my sump.... If that would work for your setup, it would be a great skimmer and keep it out of the tank....