Can you see me shaking my head? Never even look inside like you did the other day and transplanting out of a cube ...................
Do Not Do It!
Too late I guess. see the little root hairs in the picture every time you move that root you rip off the lateral root hairs and send the plant into shock and expose the roots to pathogens; like cutting your fingers and toes off and dig around in a refuse pile to see if you can catch something.
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Get some proper Net Pots Current Culture 5.5 with shelf.
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Then you place the rapid rooter, rock wool starter etc. on the shelf and place PH balanced Hydroton (not the cheap ones that screw with your PH) Get the good ones and place around it to keep it up-right. Install it on the reservoir and top water continuously until the roots reach the reservoir.