I have a 55 gal aquarium which will be an aquaponic set up, that I have started to cycle. Currently I have 7 mystery snails in to help the cycling along. I will also have some live plants (hornwart and java fern) in the tank as well as lots of hiding places. I'm planning on several fancy goldfish. However, I would love to have 3 emerald cory cats also. Is this possible? The goldfish will be small (2 inches) when we get them.