You made my day. I went on a search down memory lane when I grew in ffof and I found a plant that I have been looking for. The leaf with the split yellow and green on the bottom right has a name I forget what it is but I have been looking for that plant.
Anyway I have tons of examples of ffof grows one week into flowering with plants looking better than the one shown. The plant shown would get nothing but water until about the stage it is in the picture. If using RO the only addition would be cal mag+.
Others can help figure out what you should do now.
Try water only next grow for the first 4 or more weeks.
Just saying, if I was going to grow in ffof again and I will, I would probably exclude these items from your list:
Cutting edge solutions
Micro
Bloom
Mag amp
Plant amp
Uncle johns blend
Sugaree
Good Luck!
Just starting to flower with water only in ffof.
Oh! this plant is in a 3 gallon plastic pot, if it was in 5 gallons of ffof I would probably not fertilize it as soon as I did.