I actually just put a seedling that was rooted in a rapid rooter plug into my DWC bucket. Her roots are just growing into water! Worked for me!
And on a side note, last week I had put 3 germinated seeds into rapid rooter plugs, and I had another plug that was soaked in pH water so I decided to put a Skunk #1 seed into it just to see if it sprouted. And to my surprise, it did. And it’s just as big as the other seedlings that were already germinated! I normally use paper towel method, but this seems like the new way to do it since I can just put that seedling with its plug directly into my DWC buckets.
And I’m working on making my own mini DWC for clones and seedlings. It’s going to use plugs and neoprene disks. Plugs for seeds, disks for clones. I think I’m going to make a video and do a full thread for it.