48 hours after hydro, 1 has sprouted and 1 has not. At 6 days I've got two viable sprouts with nice roots. This is the first time I've tried using Rapidstart this early and I'm sure these are the best roots I've seen at 6 days. This is also the first time I partially split the rockwool and laid the sprout into the center with the root already out of the rockwool a bit. It worked, almost instant seedlings.