Medium was pre watered with 1ml/l of A, B and Rhizotonic.
things went slowly but it survived
I watered again after 18 hours and increased Rhizo to 2ml/L, and also lowered the (65w) lights down to 45-50cm
yesterdays pic
today's pic is showing a lot (relatively) more tight nodes appearing and growing well
no water need for another 18hours, but next batch will include 1.5ml A & B , 2ml Rhizotonic and 1.5ml Cannazym. Additionally 0.25ml of Aptus Cal Mag Boost.