Grow Journal of the Month: Mar 2020
If you've bought in the last month or two you may have 2.5.
The most recent change started shipping on Aug 13th. Anything from then on, regardless of bag, is that most recent product.
In my reading on the back story, the gist of it is that when v2 was put together, it combined the v1 formula plus the supplements. This eliminated the need for the supplements overall as a whole.
There may be minor places where one could add a tick of this or that, but for the most part it's good to go.
Yes, they still sell those extras, but IIRC they are so folks using Jacks as a base can use those with that.
Some of the early adopters in the MC thread are on v1, which is why you see them adding additional supplements. From v2, and now v2.5/v3 (whatever you want to call the update shipping since Aug) shouldn't need much of anything else other than more of itself.
@farside05 has been running with a boost in potassium (from a silica addition), but also countering it with a little nitrogen (from CaMg) as he's found that if you get the N->K ratio out of whack (1:3, IIRC) then it will lock out some of the basic nutrients like Ca, etc. He can better explain that part.