New roots above or below the LECA in s/h?

[Sandy4453]

Have this one Phal (Golden Peoker x Brother Fancy) that hasn't grown any roots in over a year and only 1 root on the whole plant, the leaf's are limp, it just sits there doing nothing. It's just now beginning to grow some new roots so, I decided to put it in s/h today (The LECA I'm using is Hydroton.)

My question is...where, in the LECA do I place the Phal? Do I submerge the roots in or just above the LECA? Does it matter?

Thanks for your help with this.