I have a 25g nano tank. When I first added the YWG to my tank, it actively swam around and posted up on various rocks. About two weeks after adding the YWG, I added two clowns and the YWG's behavior changed overnight. Although the clowns are not aggressive towards other fish in my tank, the YWG now hides away within the rock work. The YWG is now so shy that it recedes even further into the rocks when I try to target feed him. The YWG will eat frozen foods out of the water column when I do a general feeding, but I am concerned that it is not eating enough. When I first got the fish, it was a vibrant yellow. Now several months later and it is quite dull. How do I help this poor creature?