Since most 30 gal. tanks have a 12 1/2"x 30" footprint you are limited. This is a South American tank. It should be nicely planted.
5 Cockatoo cichlids (Apistogramma cacatuoides), 2 male, 3 female, they get a little more than 2" long and are a lot of fun to watch. pic by Pei Chang
5 Silver hatchetfish (Gastropelecus strernicea), up to 2 1/2" long, upper level fish. pic from Aquantv
5 Elegant cory cats (Corydoras elegans), up to 2 1/2" long, schooling bottom feeders. pic from russian site?
10 Cardinal tetras (Paracheirodon axelrodi), to 1 1/4" long, active schooling mid-water fish. pic by Nilsson
This tank will be active, colorful, and low stress.




5 Cockatoo cichlids (Apistogramma cacatuoides), 2 male, 3 female, they get a little more than 2" long and are a lot of fun to watch. pic by Pei Chang
5 Silver hatchetfish (Gastropelecus strernicea), up to 2 1/2" long, upper level fish. pic from Aquantv
5 Elegant cory cats (Corydoras elegans), up to 2 1/2" long, schooling bottom feeders. pic from russian site?
10 Cardinal tetras (Paracheirodon axelrodi), to 1 1/4" long, active schooling mid-water fish. pic by Nilsson
This tank will be active, colorful, and low stress.




i retract my statement guppy's idea sounds much nicer !