I have experience with General hydro Nutrients and at the level your plants are at I use 7ml of each per 20 litres.
20 litres is 5.2 US gallons
That works out at 1.3 ml of each nutrient per gallon.
I always thought over fertilising resulted in dark dull leaves, leaves curling under at the sides and hooking under leaf tips.
You growing in rockwool and expanded clay? Where they rinsed/ conditioned properly - as this may be why your ph is swinging so much. Try to keep it at ph 6. Adjust 1 hour after adding nutrients. If they are in rockwool at the moment - stick to one flood per day at this stage. flush the rockwool through with tap water from the top and change out your nutrient solution to the strength specified.
Add the nutrients in the correct order and mix in before adding the next - Thats micro first.
Which way is your ph going as this can tell you whether your nutrient is too weak or strong.
A perfect nutrient strength and correct ph will result in hardly any ph swing and the ppm/ ec/ cf will remain the same as the nutrient solution (water & nutrient) is consumed.
Chris