Rockwool damaging roots...

[malangon]

I built a "raintower". Not sure if that's the correct name, but it effectively drips water on the roots of the plants - 15 mins on, 15 off.

Some of the plants I used were big box store bought and I rinsed as much dirt as I could off the roots and used hydroton in net pots.

Some seedlings however I grew in rockwool.

I was under the impression I could just put the rockwool in with the hydroton and everything works out. But now I just read that since the rockwool maintains the water, it can damage the roots.

If this is the case - how do I transplant from rockwool to hydroton? Seems like tearing open the rockwool cube would damage the roots that are now poking through the bottom.