The corals are browning out because they aren't getting enough light. You need to replace those burnt out ballasts asap. Keep your water params in their optimum ranges and the corals should color back up. http://www.reefkeeping.com/issues/2004-05/rhf/index.php
When you do replace the ballasts, you'll have to reacclimate them to the lighting. The best way to do this is to place several layers of window screening over the tank and remove a layer every 7 days. If you don't do this, the brightness from the bulbs can burn the corals, and they will die.
Here's more info about QT - http://www.reefcentral.com/forums/showthread.php?s=&threadid=1207733
When you do replace the ballasts, you'll have to reacclimate them to the lighting. The best way to do this is to place several layers of window screening over the tank and remove a layer every 7 days. If you don't do this, the brightness from the bulbs can burn the corals, and they will die.
Here's more info about QT - http://www.reefcentral.com/forums/showthread.php?s=&threadid=1207733
Last edited: