Hi! i'm quite new to fishkeeping, so bare with me if i ask any embarrassing questions :laugh2: in my low tech 15 gallon tank i have 3 corydoras catfish. two are blackfin corys and one is a julii. the julii definitely gets along with the blackfins but during the few times he's alone he seems to look/act noticeably timid compared to the other two. is this stress occurring because he is the only julii? i do have plans this coming month to start up a low/medium tech 40 gallon so i can move the fish i currently have. will adding more jullis make my little guy more comfortable? thanks!