Sorry to hear that Kelly.
That's why up to now, I'm still having a second thought installing my doser. I purchased it last December, calibrated and ready to go but opted to do the dosing manually. I will probably used it only when I'm going away.
O well my tank is not big as yours and I don't have much corals as you have. I think automating the process would take away my personal touch to my humble reef.
I hope your corals recover soon. Best of luck.