Help me with my green slimer. I had it quite low in my tank for around 1 month. It looked good. I then moved a little higher in my tank. After a few days it started bleaching, i immediately moved back down but it's not recovering. Any suggestions? The tank is a 90g with a 30g sump with SWC 160 skimmer. I have a marineland fixture that house 4 h5to and 2 150w MH. THe lights sit 6 inches from the water. Calcium is right around 400 and magnesium is between 1300 and 1400. PLease help.