I used botanicare before and it was awesome.
You only need the grow and bloom nutes from them. What I use to do is get distilled water, add my nutes to it. Didn't get any defs at all and I was growing all sorts of plants from different strains of mj to tomatos and peppers. funny how I had to grow mj to get me to love growing in general.
another thing to know is that all I used was the pure blend grow formula throughout the whole grow cycle. worked wonders for me
What pureblend pro grow formula you have? is it the one with silica in it? mines had silica in it but I have noticed that some of them don't.
I don't know much about Humboldt but if they have the same or more ingredients as botanicare or if it is more potent then i would go for it. If you can.. could you take a picture of the nutes... like of the product label in the back?
these days I just make my own nutes though. I'm considering going back and using pure blend grow again.