I'd like to have some type of cleanup crew for my 55g tank. Current occupants are a JD and a GT. Neither full grown as of yet with the biggest only being 6 inches. This isnt a permanant home as Im having a larger tank custom made. Seeing as you all are the most experienced with cats, would Rapheals be a good addition? I dont want anything that will grow larger then 6 or 7 inches.