I have 3 corals that seem pail as if it may bleach out but still have a lot of color and very well alive. all perimeters seem to be in check. Stable temp between 77.-78F. I'm thinking it may be a chemical warfare between corals. No parasites, pail looks over the complete corals not just the base or tips. My question is do I leave the lights off to prevent from burning them while they are pail and irritated. Already did a small water change today and a few days ago.