Would these make a good addition to my community tank?

i love dwarf gouramis personally. and i think they would look good in both of those tanks.. people say having more then one gourami causes aggression so i tryed it myself and i have no idea what they r talking about? mine dont fight or anything.. they swim around together slowly and peacfully and what is weird about this is that they are both males?? so i think dwarf gouramis are a great fish to have because they dont get big and a fairly big compared to other community fish. and about walmart... they dont usually take good care of there fish but if u do look look for the one female that is swimming happily and doesnt have any spots.