Just got my biggest tank ever set for fishies! We upgraded from a 35 gal. To a 75 currently holding 6 assorted Australian rainbows 1 koi angel,a Chinese algae eater (4 inch), and an electric blue acara (my husband brought home the blue bully )All juvenile around 2 inches except the algae eater who I have owned 4 yrs in a 10 gal (rookie purchase from Walmart) who may be stunted or may grow with all the new room! If he gets too big I will trade him in and start over small since he is such a good tank cleaner!