Grow Mediums When to move rock wool to dwc bucket?

[HaitianPe]

Tried searching, couldn’t find the answer on here. I have a pretty good idea on when to transfer to buckets, - When the roots are visible -, but should I transfer the rockwool when I see a couple visible roots on the bottom/sides or is one visible root enough?

100% germination , 09/02
Germinated 6 seeds in rock wool (sitting in pHd water), all 6 sprouted and are moving (I thought one was dead and started germinating another, so now I have 7 and it’s moving! lol).

5 out of the 7 have visible roots now. Pics below of ones with visible roots (I just watered them and I weigh them to water so no I am not overwatering at least I haven’t been by the looks of the girls ‍)

 

[40P]

Personally, I'd move them to the bigger rockwool cubes, the 3x3 or4x4 (they have holes for the plugs), before taking them to the bucket to let the root system mature.

 

[Mañ'O'Green]

Do it now.
I used Current Culture 5" net pots with a shelf but any net pot and PH balanced clay pebbles will do. Put the starter cube on the shelf or a ~1" layer of pebbles and then fill with pebbles to even with the top of the cube. Fill the bucket to within 1/4 inch of the bottom of the net pot with 25% strength nutrients and turn on the air pump/ The bubbles breaking should wet the bottom of the cube just barely. It is hard to check so just top water the cube a few times a day until the roots are in the reservoir. then lower the water level to 1" to 1/2" below the net pot.