I would still run half strength for the first dose to see what happens. Half dosage will not let it progress further, just maintain until you are 100% sure that is the issue. If it is, then go 3/4 strength for a feeding. If you see improvements after that, then go full.
Ok. Just moved to a medicinal state where I no longer have to guerilla grow. So, indoor is all new to me.
I have 12 Root Spa buckets set up, Running The Advanced Nutrients Conneseuir Grow and Bloom (eventually) with all the bells and whistles (it was all given to me free), also running...