I used to use dry ferts and EI, but I have since gone back to Seachem partially. I was using KNO3, K2SO4, K2PO4, and Plantex CSM+B. I found that my tap has plenty of phosphates so I dropped the PO4, K2SO4, and the Plantex. I still dose with KNO3 for potassium and nitrates, but use Flourish complete for my micros/macros. I also dose with Excel as an alternate source of carbon.