Formula Flora? anyone ever heard of it? Story inside... Pros please help???

Ok so i bought these nutes called Formula Flora

I had purchased these before i had ever started getting on this site and learning alot of great things about MJ.

There is a website, and the way i found out about them was looking on amsterdammarijuanaseeds.com it was an advertisement posted on the left hand side.

At first i had no info on nutrients and saw that the ad said (greater yields). Well after getting on this site i learned about more nutrients and more products that i can buy locally so i was a little disappointed about buying this.

I dont know where i got using 1tsp per liter from but the site says use 1.1 gram per liter. I had been giving my plants about 3 grams.
The only positive look at this is that i gradually introduced it to the plants starting from .6 to what i gave it recently.

My question is should i stop using these nutes? or should i just give the amount it tells me? I have some nutes called gro-tech now but im not sure about changing the nutes since its been getting Formuala flora already.

The plants look good other than, red on the stems which at first i thought was PH but after adjusting it, not all of it went away, but theres little to none

Will my plants herm because of this? they are 1-2 weeks away from flowering and i havent sexed them yet.