I've had this Duncan for approx 6 months. It went from 3 heads to 13 heads and was doing great. Now it looks like this and hasn't opened in 3 days. What is wrong and any way for me to save It? Calc 420 Phos 0 Kh 8/143.2 Nitrate 10 Amonia 0 Sg 1.025/33.5 Temp 78 I did a 10 gallon water change on Saturday when it happened. All of the other corals are still open and doing great. Could adding rodi to top it off to close to coral cause It?