Ok so tank parameters ALk 8.0 Calcium 490 Mag 1490 Phos 0 Nitrate 0 the tank is roughly 9 months old I am newer to having Montis I have five different types 3 encrusting and 2 plating all of them including the mystic sunset show great growth on a weekly basis. Just recently the mystic sunset has developed white coloration which I assume is the coral bleaching. There is no sign of distress in any other corals in the tank including the other montis. Any thoughts could my low nutrients be the issue? I have a waterbox 20 cube with 2 clowns and a watchman goby. Photos are in order of the day I received the monti second picture was this past Sunday third picture is today. Thank you for your feedback!