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I need some tips with starting seeds in rock wool. I've started some in soil, but I want to try growing hydro, and my luck with rock wool isn't too great. Any advice would be greatly appreciated.

About two weeks ago, I came home from a weekend trip and found one of my plants leaves looking crispy around the bottom and seedling dead. Figured it must be the light so I moved the plant around, just to see it's still happening and now it's even with plants that had no signs of burn or...