Ive gone a little anemone crazy lately and have been stocking up in different kinds of Bubble Tip Anemones. Over the past week two Rainbow Bubble Tips have started to turn a dark ugly-ish purple. I have several other Bubblr Tips that are all holding their colors just fine, however. Does anyone know what causes this? Other than the color they appear in good health. I will add pictures when I can get some decent ones.