I'm starting up a new 55g and this one is simple and fake plants with rock and driftwood. I was wondering what a good number oc corys would be. In my other planted 55g I have 9 since I don't vaccum the substrate much cause I don't want to uproot anything. I figure a good cleaning crew would help. Now with the new one being all fake I'm thinking I won't need as many. Maybe 4 to 6 or something.