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I am having a brown algae problem in my undercurrent. It is pretty bad and the babies are young. I was told by my local shop that colloidal silver is the only thing that will cure it. I was gonna put take them from the undercurrent and replant in soild but they said this would fix it. They are pretty knowledgeable but I wanna check for and see of anyone has tried it before I do. Any help is greatly appreciated. Heres the link to my first post about the problem if that helps any. https://www.rollitup.org/dwc-bubbleponics/802015-urgent-brown-algae-undercurrent.html