You would be suprised at how well the gourami are suited to the fronts. I never would have thought so and to be honest NEVER would have even bought them myself , EVER. I would have stayed away since they are not a cichlid and to be honest are not that attractive as small juvies like most people see in LFS. They are much better looking as large fish (large pinkish metallic scales) and so gentle. Highly adaptable as well. They can live in a wide range of water parems including higher ph's in mid 8's. I have tried a whole lot of haps and peacocks in with my fronts (I really like the look of community tanks) and i have to be honest , these gourami are 100 percent better than any cichlid , african or new world, of any temperment or species that i have tried. Including haps such as blue dolphin etc... They are big, slow moving, slow feeding surface feeders that do not compete with the fronts for food and are truly non aggressive in everyway. They also like to interact with people and seem to enjoy it when you touch them and hand feed them. A truly delightful addition to my tank. I should say as you can tell by the pics the gourami were much larger than my fronts when i introduced them to the front tank, but i seriously doubt that would have made a big difference by how the fronts act around them as long as the gourami are similar in size or large enough not to be a snack.