I added selcon vitamins to the food the night before the next day the water was super cloudy and 5 out of my 7 fish died. I immediately started to clean my skimmer that had a calcium deposit lodge in the air line and I saw my skimmer not producing bubbles so I cleaned the entire thing. In doing so I broke the skimmer inlet and have to wait for the spare part to use it I’m running carbon now and have been doing water changes. Went to the lfs they said the parameters were perfect to my disbelief, tested it twice same result. Yesterday it looked like eggs were released all over the tank.