I currently have a 12 gallon aqua pod and I love it. I am looking into upgrading it to a 24 gallon system. I currently have 1 maroon clown 1 fire fish and a cleaner shrimp. What other types of fish could go into the tank if I were to upgrade to the larger tank. Or what would be the perfect stocking idea for a 24 gallon tank. Thanks for your help.