[flipper]

Hi!
Id say seven or eight if you are not going to add to the tank with other fish apart from the Dwarf. If you do add more make sure you add enough flake food to fall to the bottom for the Cory. Corys like stiller water so could turn any power filters down a bit or point towards side of the tank - not a violent flow right into the tank is what I mean!!! Only one dwarf Gourami? Was it a pair originally? Just checking you know they should be a pair ideally! good luck x flipper