Everything in my tank is doing great. Since my last water change about a week ago my Duncan has not been opening. It partially opens when the lights are off. Any idea what the problem may be? Or what I should do?
For starters I would check N03 and P04, LPS like a little bit of dirtier water. The duncan might be the first to give you a sign. I have Acans that are the first to let me know when parameters get out of whack.