Don't worry about them being same height yet, that gets sorted while in the DWC. Just focus right now on getting them to push their roots out.I moved the light closer, and I water the cubes every three days. I barley see the roots coming out from the bottom and I’m waiting for them all to be the same height before I transport the cubes to the hydroton DWCS.
Id Bottom feed the cubes (either dunk bottom half or use pipette to drop a few ml at a time).