Recently I noticed my brain coral has bulging spots on it. They move to different spots along the ridges so it seems like It's never bulging in the same spot from day to day. After they move to a different area the coral looks fine in that spot. Recently upgraded my T5 bulbs to power chrome 22000k actinic+ and 15000k aquablue+ same watt bulbs. Could it be bubble algae under the flesh of the coral or is it growing? The areas that bulge look kind of brown.