I just finished my fifth crop on this stuff, I have a 100G res, and I STILL have my bag left over. We are talking at least 21lbs+ of indoor off that one bag, and I am starting my next run and still haven't opened the second bag I ordered 8 months ago cause I was sure I was going to run out, lol. My observations are that it grows some really dank crystaline buds with high potency, I was paying about 200$ a run on water and now for 130$ I've done 5 runs and will probably do another full run on this one 22lb bag that never ends.
I'm going to also use it outside this summer with my 4 autopot setup. They need to make some pots bigger than 6.5Gallons. How about some 25 Gallon pots?