Re: Dwarf Cichlids vs. Cichlids
As a general rule, most cichlids do tend to be some-what aggressive, but it varies greatly from species to species. Most of the dwarfs to tend to have a more mild temperment, but many are picky about water quality (Apistos, Rams, etc.). Most cichlids are great parents and will aggressively defend their young, but this is only a concern if you have a breeding pair. Some small cichlid species will be an option while stocking the 20g that you are planning, but most would pose a threat to any other fish if they spawn.
I hope this answered your question....