From Microcosm Aquarium Explorer

A pair of Ram Dwarf Cichlids spawning in 20-gallon community tank. JJPhoto.dk

To start the thought process for planning a new community aquarium, and to highlight some combinations that expert aquarists have found to work, here are some models that can easily be replicated using readily available species, all profiled on this site.

For the typical neophyte ready to start with a 10-gallon tank, here are some nicely balanced model communities, followed by larger aquariums.

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Excerpted from: 101 Best Tropical Fishes