I love neon green rasboras and cardinal tetras because they are small, they school and have amazing colours. But which is easier to look after? I have a 19 gallon aquarium that is about 55 *40 * 40 cm that I am planning to have a single species in. I would quite like to have a go at breading. I will be away for the most of the summer so I will have to tell by brother who doesnt really want to look after fish how to care for them so they can't be too dificult. Are either of these fish ok? any other suggestions?