Hi fish ppl! So I have a cycled 20 long planted aquarium, ph 7.2, temp 76 and canister filter for up to 30 gallons. i would love a species only schooling fish that's small, such as neons or cardinals but they have a higher risk of diseases and blood line issues. I just love the red and blue so I'm looking for something similar, but not crazy expensive...:;2cents...any ideas. i may add a nerite snail or two and some cherry shrimp eventually but cherries and torpedo shaped fish have a small bio load.