Depnds on which Nute you use. Given the size of the plants, and the look of them, "full strength" should be fine. If using a bloom booster for cannabis, give the reccomended dosage that the manufactur says. Generally these are listed as 'per gallon'. For example im using Dogget and Simpsons Stage 3. It says 1T/gal. Im using a half gallon of water so I use 1.5t (3t=1T).
pk--•Dosage: 15 ml / 10 Liter - 6 ml / US gallon (1:666)
boost--•Dosage: 20ml/10L - 8ml/GAL (1:500); for extra stimulation use: 40ml/10L - 16ml/GAL (1:250)
It looks like auqa flores is a hydro feed. Go check out there website and it tells all the info you need for dosages. it looks like you have what you need to fixthe problem sir.