when i was keeping chiclids i never had a problem with fish from different lakes together, and learned that because, i couldnt afford 15 tanks at the time. however like was mentioned previously, why mix them, take your time, keep and aquascape for one kind then find a nice LFS that trades and when you get tired or bored, tear it down and start over, Variety is the spice of life......unless you ask my wife she never agrees with me about nothin