Hi, I am new to the saltwater hobby but I have had my tank for about 5 months. I got an established aquarium from a friend. It has 3 clownfish, a starfish, an urchin, some snails, and hermit crabs. My tank is 38 gallons, I want to add 1or 2 more fish but I'm not sure what to get. I want to get nonaggressive fish but sometimes my biggest clownfish is a bit of a bully toward the 2 smaller clowns, what should I do?