1 Butis Butis (Crazy Fish) and 1 Knight Goby
or 1 Ctenopoma (Spotted Climbing Perch)
The Butis Butis only gets 6", the Ctenopoma gets 8" (depending on species).. The knight goby would be a nice bottom dweller, and they will also eat live prey. With the Butis/Goby combo, you would have to do a light brackish tank. That will be easy to maintain at 12g..
Good luck finding those fish
or 1 Ctenopoma (Spotted Climbing Perch)
The Butis Butis only gets 6", the Ctenopoma gets 8" (depending on species).. The knight goby would be a nice bottom dweller, and they will also eat live prey. With the Butis/Goby combo, you would have to do a light brackish tank. That will be easy to maintain at 12g..
Good luck finding those fish