What can I stock in a 40g Hex tank? Cichlids are low on my list, I'm trying to think of something like a peaceful community. Maybe, South American or Asia. Definitely want warmer water. I want to follow the quarters rule. EX. floats at the top "Golden Wonder Killifish" swims near the top "Powder Blue Gourami" Fish that swim in the middle " Cherry Barbs" Fish that swim on the bottom "Kuhli Loaches" I Really want my kuhli again. my LFS still has them. Can I bring them home when I cycle the tank?