Before I answer, I remind everyone of my legendary 'spaghetti sauce' [ aka 'lazy man's] approach to gardening. I've been using this method with these nutes for several years. I rarely run clones, so my method is more a 'one approach' to all, with some tweaking along the way for obvious trouble, which is most often nute sensitivity. Okay then....
In 5 gal DWC, one tsp DynaGro 'Foliage Pro' through veg, regular DynaGro for 3-4 weeks of 12 / 12 [ depending on anticipated finish ], then DynaBloom until approx 10 days before finish. Change out the reservoirs every week, topping off with Cal?Mag in between changes.
Normally a weak nitrogen solution would be the first thought after making sure of the 5.8 ph, but I'd just changed the resrvoir w/ full test gro just before the fade started. I decided to just top it off as usual w/ Cal/Mag and give it another day or two before dumping 3 gals of nutes.
I have
no idea. And that's the truth.