I have a 30 gallon tall tank. It's well planted with lots of hiding places. I have 5 upside down catfish 1 male gold gourami and I do have a cory cat that I plan to more to another tank once i catch him, lol. I was just wondering what else, if anything, I could add. I read that the upside down catfish will get large and eat small fish so I am nervous about that. I would love another gourami but I know they are very territorial. The tank Just seems very empty to me, especially in the middle. What do you guys suggest?