How high is your tank? Most people from what I heard tend to say not to keep Angels in a tank that's under 20 inches high because of their potential size. I think they are relatively slow growers though so I'm not too sure if you would be ok with them for a while at least. I know my friends dad is keeping one in a 125 that's either 18 high, or maybe even 15 high. He hasn't had any problems at all. he's had it just under 2 years so far. He also has a bristlenose plec, 2 Bolivian rams and 10 cardinal tetras.