I have a different opinion when it comes to browning out when it comes to LEDs. I've been running mine for 16 months. I had my ups and downs with my lights for the first little while and than my corals took right off once I thought I had them figured out. I decided I needed to get some more to supplement my reds. So since I was adding more I turned my lights down from 100% to 70% intensity. After 2 months of this the browning out and slow growth started. Cranked the intensity back up to 100% and since that time my growth has picked back up and the color is coming back. I'm not near my tank right now but I will post a pic later as I have a red monticap that will show you as the new growth is red rather than the brown it has turned. In my case I strongly beleive it was a lighting problem and not nutrient related. With your tank being setup with LEDs from the start i'd have them cranked up. And I agree that your corals will not have that same pop as they do under MHs
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