well that depends if you want fish that are going to be huge or fish thatare going to be half a foot or so. If it were me, I would get a baby jardini, royal pleco, and baby peacock bass. Once they got big enough, of course switch to a bigger tank. I have taken care of all three of these fish and they were a blast to have. Just make sure u have a hood, I have seen the jardini come to the top for a kill and he overexaggerated it, but he came out of the water lol. But if you want smaller fish, I have always like ghost glass catfish, african and south american cichlids, such as the electric blue.