Yea man since i live in the SW my first month veggin was $265, 2nd month $540 and I just got my 3rd and it was a lovely $820!!!! Thank god i didn't do a 2 lighter like i was planning...i would have broke even and made no cashola!! As for the Calender thing ur soooooo right man! I have a huge one on my bathroom wall where i mix all my nutes and RO system. I keep track of how much of each nute i used every week when i change my rez, the ppm's/PH, and other shit like when i took clones. Im actually jus killin time while my 100 gal rez fills up...takes forever!!!!