was wondering what corals and how many I should get to start? I have a 55gal take with 4 fish, 2 clowns, a blue tang and bi-color angel. weekly water changes gfo and carbon reactor along with a protein skimmer. Always use ro/di water and have about 35 lbs of live rock and a vortex mp10 powerhead and led reef light. Also, should I isolate the corals or put them anywhere? All help and advise will be greatly appreciated. Thanks