My display is 150 gallons, and my sump is 60 gallons. After posting this thread last night, I was considering trying to do what I can to save the tank with antibiotics, but I held off. Judging by what I saw this morning, they wouldn't have helped anyway. It was a harsh sight - all my coral had perished. The only survivors are my zoas and a few mushrooms. I lost my prized 24k torch colony with over 15 heads and several other torch corals I've been caring for over two years. It's a pretty tough moment, and I'm seriously thinking about giving up on the whole saltwater hobby. I live in the northern part of Canada, where corals are quite expensive. So, losing all my coral probably means I'm done with this hobby. It's a harsh reality that I killed thousands of dollars' worth of coral and all the time I've invested in this. I acted on impulse without doing enough research. I was hoping someone might have a miracle solution because it felt like my whole world came crashing down. Thanks to everyone for the responses and advice. And for anyone reading this down the road, make sure to do your homework before messing with your tank. You can lose years of hard work in just a day.