I have a 29 Gallon tank. I have Gravel Substrate. For filtration, I have a Top Fin 30, and a Penn Plax Cascade 300 I am looking to stock it with multiple different species of fish. I currently only have 5 Lemon Tetras. I want to increase this to 8ish. What other ideas do you guys have. I kind of only want fish i haven't kept before , so that rules out the following; Red Eye Tetra Black Skirt Tetra Betta Guppy Platy Celestial Pearl Danios Dwarf Emerald Rasboras Peppered Cories Thanks for all suggestions in advance!