I have jags, red tiger motguense , red devils and the like, Oscars, green terror, black ghost knife, flower horn baby, vieja synspillum, jack dempsey, Mayan cichlid, catfish, various plecos, silver dollars and breeder guppies, barbs and tetras. Of course not all in the same tank haha. I'm up to 6 aquariums and three ponds. Smallest is a couple 40b up to 180 gallon. I'm also currently building a 270 gallon plywood tank (when I'm not working 75-90 hours a week)