Rock wool

Hello once again,
I'm starting some new seeds, got some rock wool, how do I use this? Any pointers on it

Also any one got a way other then ph down mix to drop the ph

lemon juice, or distilled water is right around the right ph to begin with. if you go with distilled water though you need to add cal-mag

Okay any one got some pointers on this I've never done it do I wait for roots to show from the side? And up in to dirt or what I've wanted to try it any help appreciated

once you start seeing roots out of the rockwool you're fine to transplant into whatever medium you'd like. I transferred 8 into a dwc bin and 4 into 1 gallon pots, plus I still have 18 more sitting in my clone tray waiting to find new homes, check out my grow and ask away........ https://www.rollitup.org/grow-journals/739973-very-first-grow-blueberry-trainwreck.html