ok I had my mom turn my MH on for one hour in the morning and one hour in the evening. once I got home today I saw that my grapevine favia has turned white, my meteor shower has turned from to some weird brownish color?, my tyree red dragon is turning white on the bottom, and my sweet blue tenius is still white with a blue tip. I have plenty of flow and my temps are steady now. I'm going to do a water change and test my alk tomorrow. I don't understand why this is happening because my montipora is doing fine and so is my hammer and frogspawn. I would really like some help with what's going on. my tank has also been set up for probably 4 years now.