I think a skimmer would benefit you. Is your wet/dry a HOB
or is it under the tank? Are you using biomedia in it? If so, what are your nitrate levels?
If you have a wet/dry that sits under the tank, you'll get better performance from the skimmer if it's in there. The skimmers that come with most wet/dry filters are not very good anyway so I wouldn't be too upset about not being able to get it going. If you can't put a skimmer in the wet/dry, then a good HOB
skimmer would be a good investment.