Carnation Corals aren't photosynthetic and will need to fed at least a couple of times per week. i have a large Carnation Coral, 3 colonies of Dendrophyllia and 4 gorgonians in my tank, all of which I have had for at least 3 years. I feed in the enveings and keep my corals well fed 3 times per week alternating with live baby brine shrimp, frozen cyclops, Tropic Marin Pro-Coral Phyton and TM Pro-Coral Zooton. As the names suggests TM phyton is a photo plankton like product and Zooton is a zooplankton like food product for corals. I have noticed greater polyp extension and more pods etc. in my tank since I started feeding the Pro Coral foods.