It's not overkill. If it's free, give it a go. Can benefit any fish. If you can get a pic of the wet/dry with inlcuded plumbing, many here who can help.
Is the tank drilled? It may not be, as it may have come with a hang on the back overflow.
Is the tank drilled? It may not be, as it may have come with a hang on the back overflow.