I dont ever get past 1300ppm on first grow till i get my conditions perfect for new strain I try.I start around 750ppm first wk harvest 1200 week 6 then back to 1000pppm around wk 7 and 900 to 800ppm week 8 just gradually going up and then back down.using final phase to flush in last week of harvest.I have used final phase 3 days before harvest and still have pure white ash,really good stuff.
as for mixing I have come up with my own method.ERIC BISCA from underground grower brought this up in a video so I looked into it.what I have found out is.
MIX your strong products first these are ones that will kill your beneficial bacteria,fungi,microbs,ect... so I mix my acids and my straight nutz like cal-mag,ect
once these are mixed and diluted then I mix my base nutz followed by my bacteria,fungi,microbs then I mix in the carbs.sugars,ect.that they feed on to shit out good stuff for the roots.
in order for my flowering cycle
H2
F1
Cal-mag
AN conni A+B
mother earth bloom
voodoo
sensizyme
big bud
bud candy
and or organic unsulfured molasses (mixed pryor with warm R.O water to dilute this stuff is thick)
im sure I am missing a bloom enhancer but this gives you an idea and YES i have noticed a difference the first one is im not KILLING all the money I spend on the live organisms when I pour acids directly on to them so I am saving money and getting better growth.
the 2ML is just a basis or ref for dilution does not mean your plants are ready for something that high or maybe its not enough in its life cycle
You will have to invest in a GOOD digital PPM/EC meter<<<< a must I use BLUE LAB combo meter that has PH,PPM,EC,CF,on a 500 scale (means at 1.0 EC = 500 ppm) I use Electrical Conductivity measure more than Parts Per Million as EC is a more exact metering of the salts in the solution.
If I did not cover a question you asked bare with me and I will be more than happy the answer if I missed.