I've had my new tropical set up a few weeks now. I want to get some more fish but not alot because its only a 30L. I have 2 black mollys, 2 platys, 2 amona shrimps and a peppered catfish. So far so good they all get along great and have no territoral issues. Im after something that will get along with these fish. I want something which is colourful preferably blue but it can't be hard to get hold of. Anyone got any ideas? Help would be appreciated