I just upgraded my fish tank light to an Aqueon Optibrite LED for my 16g bow front tank. I’m just a beginner so these are probably stupid questions! It comes with a timer to set the white, blue and RGB modes. Can you give me advice about how much time to set each and what is the purpose of the RGB light mode? I’m gradually replacing the fake plants with live ones. Right now I have an Anubis and anacharus. I’ll be buying plants that need low to moderate light. Thanks!