Could be its just adjusting to the light, in which case will eventually color back up, or it could be protesting that crazy high alk. Alk should really be between 7-9. Things can survive fine at that level, but it is not optimum, and could cause new introductions to be stressed as a result. I would recommend to stop dosing any alk until it comes down on its own, then try and keep steady at the lower level and likely the coral will come back slowly.