Hi! I currently have a 11 gallon nano reef tank with an extreme picasso clownfish, yellow watchman goby, and a nice clean up crew. I also have a few corals, and I want to add another fish, and steer away from the inverts. The clownfish was my first saltwater fish, and is my favourite, I was thinking of pairing it up with another percula clown, but not sure as some people say you need to introduce them in a certain amount of time. I used to have a purple dottyback, however after 2 months or so became super aggressive to my clown, and the clown would stay hiding, therefore removed the purple dottyback. Im looking for some other suggestions to livestock, or if what I have is overstocking. Let me know your ideas, and if you agree with adding another percula, what type?