Looking to see if my metynnis fasciatus will ever be able to go with my stingrays. Since there is variable max size on the internet I would like to know what size your fasciatus are and what size tank they are in as potential size can be hindered by the size of their tank. Mine are currently in a 230 gallon and they are various sizes with 5" being the biggest so far. SO......How long have you had your metynnis fasciatus, what is their size and what size is the tank?