Just trying to see if anyone else had this happen as I cannot explain what’s going on. I have had a pair of square backs and 3 lyretails for about a year now. Last week all of a sudden the anthias start dying one by one. Over 8 days all are dead. Every day or two I come home to find another one dead. The whole time they are out swimming and eating food. I have had these for almost a year and out of nowhere this happened. All other fish are fine including tangs, chromis, fox faces and so on. Tank is a 430 and the only change that I made was adding focus and kanoplex to frozen food that I made because my trigger has pop eye. Any help or insight appropriated.