In CoralRx that is. I bought a rather large Hawkins colony last week that has started to bleach. I did not know before hand that dipping smooth skin acros is not the safest thing to do. I am reading tha Bayer insecticide seems to be safer. FYI I am out of town getting daily pics from my wife who says the white is spreading. Any advice? Should I cut it up? The white is lower left.