Since this is Aurora i'm assuming its all organic, and that is why you get the low N-P-K. Soul synthetics might mean it is fake (chem) but I dont think aurora would do that...check the back and look at the ingredients...Organic things dont have NPK's like you see with chem ferts (0-50-0, 30-0-0, shit like that) they have low ones like the bottles you have there. My local hydro store is stocked full of Aurora's nute products and the guy there highly reccomends them. I have never used them myself but I am sure I will in the future because they are fairly cheap, organic, and made by the same company that makes Roots soil, which is amazing. These should work very well...
Peace, and have fun with that
- Cann