I've always thought that the red or black tetra look kind of evil.
Red serpae tetra, red/black phantom tetra, black neon tetra maybe, or something like that. I'm not too sure about a 10 gallon, however..
There's also pencilfish, albinos, and glo-fish.
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Blue Diamond Neocaridina
Tangerine Tiger Caridina
Last edited by Yukiharu; 05-25-2016 at 04:23 AM.
Reason: adding more