I have one in a 29gal with some tetras, clown pleco and 5 various cory cats and 2 aussie rainbows. Mine is still shy - very docile- havent seen any agression toward the tankmates. But I don't have a 2nd keyhole to see how the conspecific aggro is. I wish I had a decent camera to show you mine, its grown maybe an inch in a summer now. I feed spirulina flakes, cichlid crisps and veggie crisps, frozen mysis shrimp, cyclops, white worms and blood worms. But like I said a very shy fish that requires dithers, low light and plants (I just use fake ones cos I am cheap lol).