Hi, i would go with the Biobizz/ or Biotabs-line. but chemicsally seen its always NPK.......in my opinion its pretty the same no matter what you choose. but one thing stays the same. Less is more. If you start a new grow , alwys start with 30 percen/ 50 percent of the recommend dosage. If you grow photoperiods normally you dont need feeding before flowering arrives, be4cause the soil feeds them. you can givew them many benefical stuff, like calcium, magnesium , aloe. Humin and fluvinacid, molasses. That does not harm them. if flowering stag arrive they mostly need a push for nitrogen for around 2-3 weeks until streching stopps. After that point pand K only ( any blooming fertiliser. For more just ask, or look into my " cookies for me" diary, there are listed a number of nice benefical stuff and feedings. I recommen very much MYCOTREX from Biotabs, these are mycorhizzae for your rootzone