dont put light on 24 7. plants will get stressed they need a rest ( what in nature doesnt??) Put on young plant nutreints and try guardian angel to protect from root rot. Run a ph of 5.6 and nutrients at 1.0 EC or 10 cf. be carful not to strech or scorch and get a fan on them to strenthen stems and dont play to much.

Also if you are there all time let them go a bit dry till they start to drop then ad solution as this encorages the roots to search for water but be very carful if you do this
good luck!!