Hello Jay I've never known Fils to be overly aggressive. As for the barbels missing on the corys, you might want to check your water quality really careful. Thats normally a sign something is wrong with your water when corys barbels come up missing or as someone else mentioned how large is your gravel and how sharp is it. Good luck John ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@majordomo.pobox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@majordomo.pobox.com. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"!