You have lots of excellent advice in this thread but i feel i need to add some things.
This is gonna be a long post but hang in there,i wish members would take more time explaining things to help new growers learn.
First off where the member said ff nutes will scum up when airaited,he is 100% correct but missing a little info,in a dwc system or airation res like you propose ff will turn to pure scum fast,this mainly happens where there is no flowing water like in a flood table,the more water flow the less scum,also nutrients that are constantly airaited are far more likely to be effected by iron fall out,this happens in systems that are constantly airaited & to a further degree in systems like mine where magnetic drive pumps run much of the time,you need experience to see iron fall out & its effect on plants or you will miss the symptom or mis diagnose the problem.
Now for your choice in soil,you need to keep in mind that those types soil are made for the experienced grower,or for the grower who takes a hands off approach to growing,the built in micro nutes will end up causing problems with many new growers.
Ok now on to vigor,another member posted that plant vigor is what dictates everything & without a doubt this is the best advice you recieved,if i may expand a bit on vigor.
Being able to look at your plants & know what nutrient they require based soley on what the plant looks like is a skill most lack,if you want to be a good grower who gets steady & reliable harvests this skill is a must have,sadly reading your post you do not posses this skill as of yet but have no fear,you will but you need to stop a few things.
First you have way over thought a new grow,only a very experienced grower can set up a feed schedule at the start of a grow,and then the feeding schedule depends on strain & plant vigor,the grower needs to change nutes as the plant needs different nutes,not by a manufacturer chart,using pre fertilized soil along side a manufacturer feed schedule allmost allways leads to nute problems.
If i was in your shoes i'd rethink the grow,the 1st thing i'd change would be the soil,i strongly feel those type soils keep growers from seeing what the plant needs,i'd use an off the shelf soil with no nutrients in it,then i'd forget any hydro fertilizer,most are not full service nutes & require plant knowlege to use properly,substitute a good economy fertilizer like Peters or Jacks,or even Miracle grow all purpose,with any of these u'd mix at 1/8 strength.
I would amend the soil with 30% perlite & start growing,then once in heavy veg fertilize one time,then in early bud fertilize again then about 3 weeks later in heavy bud fertilize one last time,after that wait & chop.
Anything more & your setting yourself up for learning backwards,what i mean is this,you've planned the soil which is heavily laden with nutrients,you've chosen a fertilizer that requires exact doses & multiple mixing tables in order to be a full range nute,you've even planned how often to feed & at what doses or ppm,all this planning causes most growers to learn about heavy nutrient burn,nutrient lock out,flushing out nutes,water logged plants showing nitro overload ect,this method only hampers long term learning.
Start off slow using only the extreme basic materials,then once your skills grow you will know by looking at the plant how to feed it,you'll know exactly what ppm to feed the plant as well as knowing when to let things alone.
Your planning way too much without having the ability to judge plant vigor,this is why i said that member gave you the best advice beacuse every last question you asked depends soley on what the plant looks like,how its responding to feeding & watering,overall plant health ect,again vigor is where your learning should start & something that cant be learned through study.
