i want to add two blue damsels to my 55 gal. tank. here are my current fish. 4 green chromis, 1 4 stripe damsel, 1 percula clown, 1 lm blenny, a cc starfish, a coral banded shrimp, a decorator spider crab and several hermits/ turbos. do you think it is cool to add them? im a bit worried about...