My 8" ST shares his tank with a big ornate, 5 CL's a couple of surinamensis, sevrum, silver aro, synotontis, and a raphael cat. I've got 3 smaller ones 1.5-2.5" that are with two smaller ornates, growing out to go in the big tank with the other dat and bichir. I'm going to add some smaller CL's to that tank too, and maybe another ST as the big one is constantly picking on the medium one.