I have been putting up lots of threads about fish lately, and getting great responses. But I would still like to post another one! I have a 30 gallon tank, with 6 zebra danios, 1 mystery snail, and 1 weather loach. I want to get 6 Rummy-Nosed-Tetras for my tank. What do I need to know about Rummy Nosed Tetras?