I'm in Springfield OH... about 35 miles west of columbus.
I mostly go to Jack's. I've been to Springfield's, Fairfield's, one in Dayton, and one in Columbus (on the West side somewhere).
All I can say about it is those stores go up and down. It used to always be that the Springfield store was horrible (half the tanks were being treated for one thing or another, dead floating fish everywhere, etc) and Fairfield's was like going into a paid aquarium. Now it's the complete reverse. So I don't know what their deal is.
But overall they are decent stores. I've never tried to get advice though, the employees never seem to much know what they are talking about. Plus it takes 20 mins to get anyones attention. I always just go in there knowing what I want!