Ok if I get Potassium Sulfate, Potassium Nitrate, Magnesium Sulfate,Potassium Chloride,Mono Potassium Phosphate, Plantex CSM+B is this all I need for ferts? Is Phosphate in KH2PO4 that Mono Potassium Phosphate? Then when mixing do you have to take in account that 3 of the chemicals have Potassium in them and split that dose between the 3? Am I understanding this correctly that the Platex CSM+B is micro nutrients and that Potassium Sulfate, Potassium Nitrate,Magnesium Sulfate,KH2O4, and Potassium Chloride are macro's? Think I may have a handle on this now. I read chuck's site and got the calculator. If I have this now please let me know or correct me if I'm wrong on anything and go back to reading again on anything I goofed on. Again thanks for any help and do appreicate your time to help me with this.