I have used it for many, many, many years and I use it full strenght after they are in the vegative stage. I even use a week formula for cloning too.

I do have one grow running on Advanced Nutrients Sensi Pro formula to see if it's any better.
Zandor Reviewed by Zandor 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