Hello I really need some advice here. Some of My zoanthids have seemed to brown out and I don't know why or what to do to help them out. My water parameters are all good and stabile I just did my water test yesterday and my results were: kh:9.2dkh; Ca: 430; mag:1320; no3:3ppm; po4:0.04. I have them under ai hydras my settings are 25% for white 60% for blues and between 15%-40% for violets uv greens and reds. I would appreciate any help I could get.