Been encountering some odd zoanthid die off and growth in my tank for at least a month or so. ICP results came back pretty clean except for elevated Iodine/Potassium and Mg (1600). I was dosing some lugols but have discontinued and noticed no improvements. Mg was the result of a bad test kit, and then dosing based on it. Water changes are not making the tank any better... I do not use any hand creams, lotions, etc. No change in cleaning products.