They grow to around 2" (5cm). they prefer a sandy substrate, but you can keep them with pea or rounded gravel. Temperature:22-26oC (72-79oF) They will eat flake - but you have to get an egg cup put a little tank water in drop in the flake and swish it around before putting into your tank so it sinks or the flake will just float on the top and get eaten by the other fish before the pandas get a chance! They also need sinking granular, wafer and pellet foods, and frozen with frozen/live foods.
They should be kept in groups of no less than 6. I have had some in my tank since I started fish keeping 4 years ago and wouldnt be without them they are such lovely little fish.