First .... NEVER try to diagnose plant issues under “ unnatural “ light. Color tends to highlight shit that really isn’t an issue.
Second ..... PLANTS IN FFOF NEED NOTHING ADDED.
Plant looks young and is still needing to acclimate to soil. . Like stepping into a hot tub .....
This where many goof up , soil is highly ammended and often causes upfront burning on some strains . And adding even more Nutes just makes things worse. That medium believe it or not Will carry growth for 5-6 weeks on “ water alone “. Ph 6.5 and kick back.
FF trio is highly concentrated, so keep that in mind. Gro big can torch a plant if not careful. Big Bloom is the ONLY organic out of the 3 and can be used with this soil , starting at 1/4 strength so plant isnt overwhelmed until it continues to acclimate. Some strains are sensitive , but they grow out of it , if don’t dump more things into equation
If using RO water add a little calmag ( since it is sometimes filtered out ) . I use Tap and no issues. It’s a plant just like the ones outside and they don’t need fancy water.
Third ..... Always run BOTH SWITCHES ON with vipar..... Always.
Look forward to an amazing stress and hassle free harvest 
