Ok...umm now I am confused. You said the second link is the correct product and another person said the first link. I apologize but I am completely new to all of this. What are the main differences between the two?
The first one has nitrogen in it which you don't need to add more nitrogen as the plants will get this from veg nutes.
Basically too little nitrogen can be rectifyed by adding more feed.
But too much nitrogen then you will have to flush out and this could mess up your schudule, and also nitrogen is hard too flush if there is too much in the plant.
At the end or harvest you might be waiting for the leaves to turn yellow during ripening and if there is to much nitrogen then this will not happen.
You will then think your plant is not ready but your buds will be.un used nitrogen can create a dank nite like taste in your buds.this is why u flush every 1-2 weeks as this will make sure there isn't a big build up,which can also create nutelock.