OK, I just moved my Africans to my 125 gallon tank. I have 8 yellow labs, 8 Rusties, and 6 white tailed Acei. I'd like to eventually add a few more fish, and this mix is not very aggressive. I'm not really sure what to add, but my husband is a fan of the deep water Electra, and I particularily like the Blue Dolphins (C. Moorii). I'd like a place to start researching, but when I look at mixes, they are for smaller tanks than I am using, and I'm not sure of my limitations, or even what to stock. I'd like to stay with the not so aggressive fish, and little risk of cross breeding (I would say no risk, but that would be species only). Thanks!!