i would ditch the ugf anyways. 1. they are outdated. 2. they are not effective with cichlids as they are diggers. the plates become exposed and create dead spots. 3. they are a pita to clean. 4. if not cleaned under properly the waste will sit under there raising your ammonia levels.
if you do prefer biological filtration, you might want to check into fluidized bed filters or fbf's. fbf's are a more effective biological filter than the ugf.