Provide the fish with some type of substrate (small rocks that you find in a pet store are perfect and they come in lots of colors). They also require some type of vegetation or form to provide them with cover. The more cover a fish has the less stressed it will be. The bowl is likely not large, so I wouldn't put much more than that in there. That should be all you need. You should only have to take it down every once in a while to remove old food and wastes as they can cause an ammonia build up. Just make sure you do a 20% water change now and then. Good Luck!
