Check out these awesome Rainbow fish aquariums. I have a personal soft spot for Rainbows (I had a family of Boesmanis), and these two aquariums are just incredible. These must be very happy fish! It looks like the aquarium owner has chosen mostly low light, low maintenance plants. Seems like a good decision for a tank as big as the first one, since trimming that with lots of stem plants would take hours. Note the mesh over the top of the aquarium: Rainbows have a tendency to jump, so if you keep them, make sure you have something to stop them from jumping to their deaths!