New to OG kush and Dyna-Gro!

I have heard that OG kushes are low PPM feeders and they love Cal/Mag. I have been growing for 3 1/2yrs and I feel like I am ready to take on some OG's now! I am kinda nervous because everybody says that they are for experts and not very forgiving. I was wondering if there is a certain way to mix dyna for the OGs? I know that there is a Mag supplement, but I do not see many using it on flood/drain tables.
I have been doing 80/20% bloom/grow and not adding anything to it. To be honest, I dont really know how to use the ProtekT. I just add a little to the fresh water before I mix, so that I dont have to use much PH. I am just getting excited about my last seed order, but nervous because I am a novice grower! I am just trying to do a little research before my seeds get here. I have steer'ed clear of all OG dom strains until now.

My confidence has been busted because my last few attempts have been shitty. I have learned from my mistakes and I am actually getting a green thumb now! Man, I feel like I have been through basic training with this stuff for the last 3yrs. I feel like I have found the source of my problem, not enough cal/mag! It sounds so simple but to a newb it can look like N lockout/Def!!! Anyways, I am excited and waiting on my last seed order. I heard that 2 the Reserva Privada guys left and formed Elemental seeds. I ordered their True Og and they have 3UFO's. I also got StarKiller from RareDankness with a free 6pk of Ghost of LeeRoy. Plus, I am sitting on a pack of TGA Jesus og. I just wanted to stop butcher'ing my plants before I ruin multiple $100 seed pks, jesus was $140. There is cooler stuff, but it is not in stock right now!!!
I dont know anyone else who grows, so I am limited on my resources.

My last grow was OG kush (cuttlings).
And yes they tend to suck all the cal-mag from the substrate. If you are growing on soil, adding 1gr per 1L chalk to your soil would most likely prevent you this problem.
Also chalk tends to stabilize ph levels. So you can freely lower the PH of your water without beeing scared you'd hurt them. (dont go below 6,2 on soil imo) make sure you calibrate your PH meter weekly.

goodluck

I have some OGs that I am growing for the second/third cycle now.

I run in Happy Frog and they don't need anything for the first 2-3 weeks while they are getting their roots settled in after transplanting.

After that for the first 2 weeks of transition they only get ph'd water, 5ml of CalMag per gallon (Botanicare is the brand I use), and 1 tblspoon of Hi-Brix molasses. They really don't need much until the second week it seems. I have tried jacking a plant up on 15ml/gal of go-go juice for the first two weeks, and I have starved a plant for the first two weeks, and the strain I have doesn't react any differently.

After the first two weeks I go to 15ml/gal of bloom (again, Botanicare), 5ml of CalMag, and 1tblspoon of Molasses.

After week 4 I go into a 20ml/5ml/2tblspn regiment.

The last week it's back to just water and molasses to clean it out...

And I only fertilize every other watering. Otherwise they just get water/calmag/molasses.

Water - feed - water - feed - etc...

As for ph I stay between 6.3-7.0... I don't try to get too exact, I'd rather be 0.1 off than have to keep adding more and more ppm to try and get a perfect ph.

OGs aren't as complicated as people think... they just overcomplicate them...

Edit: Here's a pic of the OG i grow...