whatever im pretty fucken sure it existes and I think its how they rate the medical grade weed,best strains are Triple A Second best strains are Double A...... I dunno I have heard alot of talk about it around here though.... and you have to be retarded if you cant tell the difference between Hydro grown White widow and mexican ditchweed Duckfool
3rdEyeVision Reviewed by 3rdEyeVision on . double & triple A hydro what is double A & triple A hydro? Rating: 5