Hello! I just recently set up my saltwater aquarium. 20 gallons. I’m very new to this and have done a ton of research. Im struggling with the lighting. My aquarium will eventually have soft corrals and and anemone with some fish. (I have 2 clowns right now and some snails and hermits!) I don’t have any corals in there at this moment. I have the coralife seascape light. I can adjust the lights (blue, white, rgb, in increments of of 10. (10-100). What do I need to set all these too? Also I don’t get the point of the RGB. Is it just for show or does it help the fish and corals? Any help will be much appreciated!!!