Pre 90 it was trade secrets. Passed in Pen Pal Clubs lol. Now its expensive and called second string info. It will grow some nice buds.
In the old days if a man had to travel for a living his partner could just water for him and all was good.
On his way back home he could stop by the NAPA Store and get some White Engine Block Paint to help reflect light of his hood and walls. The mix would beat 20-20-20 and 10-52-10 lol.