I'm not sure if I understand your question.
Of course you CAN use it, and it will pull out some junk, but will have a hard time keeping up leaving you with more waste to remove through other means (water changes, macro, etc.)
As for skimmer reccomendations, there is a lot of debate. The one universal truism seems to be that if you skimp, you invariably end up spending more in the long run.
I'm not sure what animals you hope to keep, but it will have an impact on what you buy. I'd probably look for a rating double what my tank is, so for you one rated for 250-300g. On my tank (450g) I run two skimmers each rated for 550g. Overkill? Probably, but they both keep pulling gunk and my stuff stays alive so I'm not changing.
Personally, I've grown fond of recirculating needlewheel skimmers. Low maintenance and low operating costs, but more $ up front. Luckily I buy everything used, so I've saved a few bucks. Deltec, Euro-Reef, BubbleKing, and H&S are all this type of skimmer.
The other big design is beckett, which I've never really played with. Guys who run them swear they pull our more junk. They seem to need a little more tweaking, and require a beefy pump to push water, meaning more $$ to run.
Shop around and ask questions of everybody. There are millions of threads debating the pros/cons of each in the equipment forum.
p.s. if you do think beckett, I have a barr for sale that would be perfect for 150g. I'm hesitant to mention since I dont want you to think I'm just tring to sell my stuff. Ask a million questions, and you cant go wrong.
Lastly, skimmers are an obsession, and we always want another "better" one.
