Hello, I currently have a 20 gallon long "mini monster" community, the tank holds 9 tiger barbs and 2 dwarf gouramis, the dwarf gouramis are a pair and the tiger barbs get along well with the gouramis, the tank is also short term and it gets 50% water changes every week, I am looking for another tank mate that can go with them, preferably something that is predatory (can eat crickets, bugs, small fish) and personable, I was thinking of golden wonder killifish but I am not sure they will be compatible with my fish, will they? Another fish I thought of was the rainbow cichlid, which seems nice but I dont know if they can go in my tank, any ideas for fish that can go with the dwarf gouramis and tiger barbs, the fish doesn't need to be able to eat bugs /small fish but it will be nice if it can so I could do a feeding frenzy.