First dwc in a single bucket. Noticed one brown root a few days ago. The rest were white. I cut the brown one off. Today I found the entire root mass is browning. I'm feeding Advanced Nutrients Trio supplemented with B-52 and Voodoo Juice. Resevoir is maintained at 67ish to 70F. Changing rez weekly. Just ordered some Southern AG fungicide should be here in a few days. Am I on the right track? I can lower the rez temp if need be. Plant is in early veg and seems fairly healthy at least in the foliar environment. I thought I had my bases covered but apparently not. Any advice on turning this situation around would be greatly appreciated.