Here is a little "tidbit" of INFO'...You can interchange Advanced Nutrients 3-part's w/ General Hydroponics #-part. since I am confident that they are the same product;

The last time I got a gallon of Bloom I got the GH Bloom.
I have always used AN 3-part. I still have AN-micro, and grow. I will probably never run out of grow, because i veg only a couple weeks, or only a couple seedlings at a time.

micro on the other hand is running low, and when I run out I will probably just buy the cheaper GH gallon of micro.

I just thought this might clear up 3-part differences for you, and/or save some of you folks, a BUCK. So I hope this helps. lw

another note. I use the same recipe for my potted soil plants, but if anything, I err on the side of less nutes in soil,
i.e.; I nute, then water 2wice, then nute, then water 2wice (every 2-3 days...according to soil dryness).

I could probably nute harder, but I lost a real pretty plant, right at the end, due to NUTEBURN...later lw