You can see in my signature what I have in my 55 gallon tank. I am wanting to add maybe two angels to it. I have to do some work on regulating my ph be fore I can even think about it. It is running at 6.0 which I have found out is NOT good. But, I have started the process of slowly raising it. I will have another post in another forum with questions on that to make me feel better about doing that right. But, once I have that experience under my belt and can keep my ph at or a little above 7, I was wondering if my rainbows would let me have angels. They are very active. Killies are too. Any input would be appreciated. Thanks