http://www.overgrow.com/growfaq/t47

those are some good formulas
Dimebag Reviewed by Dimebag on . the GH line of products Hey, Ok, I heard that if you are using general hydroponic's line of hydro ferts then you need to use only 1/4 of the stregnth listed on the bottle. Is that still true if you are using distilled water in your hydro solution??? Distilled water has 0 ppm and 0 TDS if you didnt know. Rating: 5