The most commonly found at LFS are usually auchenoglanis occidentalis and a. wittei, acquired @ say 4" they will grow to 12" in the first year, reaching around 18" in their second year and perhaps 24" three years later. Beyond that they can grow to 3' or more. They feed well on a variety of sinking Hikari pellets, shrimp pellets and red or black worms and small earthworms. They do well with water temp's around 74 degrees and a PH close to 6.5. They like to have a bit of shade in the tank from pieces of driftwood to hide in and enjoy a gravel substrate that they can sift through to find food and will keep the gravel clean as well if it shares the tank with other species, or not. They are generally peaceful with others although can be minor bullies if they deem themselves the alpha fish in the tank but don't have teeth to damage other fish as they may just want to push their weight around in a playful manner. They are usually rather shy during their first year in the tank but will become more outgoing with time and eventually very friendly with individual personalities that will eat out of your hand, sooner or later...