I add Beta Glucan to my fish's food mix every other week alternating it with Selcon or Zoecon on the other week. Seems there is some benefit to not constantly adding BG. So I alternate it with other vitamins.She is eating well and very active. She still has the bumps but isn’t itching or bothered by them. All copper has since been removed. No other fish have been affected. So I’m just feeding a well balanced diet with garlic and selcon. Going to add in beta glucan this week since she is still getting new bumps every so often.