I run AN and dont have any problems at all. If you have issues with them then thats your issue. But for me they have worked tremendously. I run connissour, overdrive, bigbud, voodoo juice, carboload, sensizyme and B52. I would like to see a comparison of this nute schedule to just a normal N-p-k nutrient schedule ran in the same environment. I would bet my life that the yield on the AN schedule would be better than just the N=P=K schedule. my 2 cents