Tazardanswered grow question 6 years ago Hmmm I used to use House and Garden (I’m hydro/DWC) I switched to Advanced Nutrients Grandmaster line. I had always had a thick mat (rectangular sterilite tanks) of roots that completely filled the tank. With the Advanced Nutrients my roots were well there but occupied like 10% of possible area through harvest. Long story short Use Roots Excelurator (silver for hydro, gold for soil) the first 2 weeks of seedling stage and again for 2 weeks at the beginning of the flowering stage. You won’t look back. Oh when you have a coronary over the price keep in mind it’s very concentrated 1ml/gal dose so a liter mixes 1000 gallons (3810 liters). So it’s actually pretty cheap to use just not to start. My .5l bottle I bought in June 2017 is almost gone. I think it was $180 maybe