Is my reef in trouble?

[jason604]

Hi I left for a vacation to Mexico for a week and came back to a TOO CLEAN tank(all Algee gone and sand bed super white. My dad didnt know and fully cleaned everything in the tank. I've read about new tank syndrome and told him not to do anything but change the water I prepared for him invade something happens. Is this what is happening? My LpS corals barely open up now and my corky fingers doesn't open up at all. I have two Hawaiian feather dusters and one is gone and the other barely comes out of his shell and when it does its only about 1/10 out. Most sps looks fine but the porcillapoaras don't fully open up like before. Water parimeters seems fine. Or maybe because the water temp is fluctuating too much? It went as high as 86 2 days ago. I don't have a chiller cuz I'm running LEDs so I thought it won't get too hot. Also got a I relation question.

My candy cane colony is changing into a dark color. Here's a pic.


It use to be so beautifully super pure white with green hue lines into the center.
But when I tried googling white candy came coral none came up

Here's old pic.

Is it in trouble or just normal? How I get it back to its pure white color? Tentacles seems to only open around 9-10pm n after