Tell me that there is something else other than a virus which makes healthy plants wilt and the roots go brown

And they're not just brown at the bottom - theres streaks of brown just below the rockwool

hello m8 are you letting the rocwool dry out to much.if the root dry out they will die

Or Its Root Rott............

FTM

I doubt its either. I should have said - in a bubbler, end of the root is in the water whilst rockwool is nice and dry. Plenty O2 as the neighbours are thriving (so far - they may succumb)

Moved ya thread over here mate - hopefully more of the hydro peeps will see it & your problem can be sorted asap!