Hello, I am new to Saltwater tanks but I have been doing lots of research and I am planning on setting up a 20 gallon in about a month or so. I would really like some help on deciding what fish to stock, I have some that I like and I was wondering if they are compatible? All input is appreciated! Please help! Thanks! (2) Ocellaris Clownfish (1) Firefish (1) Cardinal (1) Cleaner Shrimp Is that ok in a 20 gallon?? Please help!