04-07-2013, 02:49 PM
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I cannot recommend the black ruby barb. With angelfish, never include barbs or danios as these are too active. Good companions are sedate fish, which is where some of the rasbora and characins (tetra) work well.
Avoid the linear species, like neons, rummys, etc. These are almost certain to be eaten, or the angelfish will attempt to eat them. The disk-shaped characins like the Rosy Tetra, Roberts Tetra, etc. work well, and add some colour. Flame Tetra and Lemon Tetra might work too. Someone mentioned Congo Tetra, and these are borderline because of their often active swimming; mine like to pair up (sometimes three together) and run relays down the length of the tank, for hours. This activity will stress angelfish.