I have had a meteor shower in my tank for about 10 months. Most of the time it has had bright red-orange coralites on a teal base. The base and corallites have expanded but never left the plug. For a while the coralites dominated the plug with most of the area covered in orange. Over the past couple of weeks it appears the base material has overtaken the corallites and is turning a fluorescent lavender color. It actually appears that the base material has swollen, not necessarily that the corallites have retracted. Everything else in the tank is flourishing like I have never seen before and the tank looks to be in great condition (remember I am still wet behind the ears here). It is possible that I have not seen this phase of the meteor shower but I am concerned that it may not be a good sign. Is this normal for a meteor shower?