I tried the pure blend and didnt like it b/c all of the crap in my hoses and my pump. I switched over to GH and I dig that a lot better. GH nutes are water soluble so you dont have crap floating around all over the place. GH seems to have a better pH buffer in their nutes also - but you still have to adjust the pH every couple of days or so. Its not organic, but what truly is organic these days?