My kenya tree which about a week or so ago was growing and looking great has now turned mostly white. I dont know what is wrong with it. I feed it phytoplankton three times a week. My nitrates are fine and my calcium levels are 400. I add form (reef mudd) once a week to replenish iodine levels. I leave my light on for about 9 hours a day with lunars on an hour and before and after daylights. I also have minimum flow. Any suggestions? It still opens and closes and seems to be alive. I also have some zoes which look okay and have sprouted new heads.