I’ve had my Duncan for about 4 days now, woke up this morning and it was covered in something brown and white. Pictures below. It hasn’t opened up yet but I’m guessing that’s normal any help is appreciated. I’m very new to the hobby so everything little idea is accepted. Thanks!
What are your parameters CAL, ALK, MAG. etc... from the pics it doesn't look good. Corals can be "pissed off" when acclimate to knew tank waters. My best guess is that your tank is way to new and not ready for corals yet. Reefing is a marathon not a sprint.