Anemones can use the nitrates in the water as a food source. Cutting your light is not going to help as they love light. Check you RO/DI for chlorimine. It can get through a RO/DI unit.curious why you say to not feed it? Do you think just the light will bring it back? If it’s bleached and doesn’t have any zooxanthele then how would it get nutrients from the light alone?