I have 2 rasberry plants i have been growing for about 2 months, they have been under a 400 watt metal halide for about 2 weeks
and they are in a 4" pvc tube with a spraying aparatus -

i recently transplanted them from a dwc system that wasn't working all that well - the roots were looking pretty bad due to a lack of oxygen, the new system has 4 airstones and a huge pump

my question is -

can i apply rooting gel to the roots to help the plant establish a bigger root system faster?