Hello all! Ive started a new fish tank. It's only 10 gallons. I have 6 fish in there now, well one is an African frog, a little guy. I also have a rainbow shark, an albino Cory catfish, a ballon bellied Molly, an algae eater, and a koi fish. So far all the fish are doing good except my Molly fish. It keeps spinning in circles and then swims to the top sticks it's mouth out and than sinks to the bottom. Hope he makes it! Any advice would be appreciated thanks!