ive read about people doing it. i asked about it on the lakes section but the majority vote is no because they are from different areas, so speak a different "language", more than water issues came up. you read about it all the time and a lot of the time its quite successful. obviously avoiding the big dogs like devils, dovii etc. more people say no because they like to keep the lake tanks pure much like most cichlid lovers hate hybrids from what ive figured out.
my opinion is that its your tank so its up to you as long as its not just a target to a mean fish, fronts are too nice. with regards to water perameters, if the front is tank bred then it shouldnt be an issue. avoiding extremes of course.