piss is all natural, i mean, people smoke herb that sucked up fish shit...and its not like i'm doing keg stand till i have to piss like a racehorse and then unleashing on my plants... I simply put in about a cup or less into a 5 gallon resovoir...i know there is better stuff out there...obviously, but right now, i don't have a hundred dollars to dispense into quality nutrients...I would if they weren't growing, but they're growing pretty well for now...when i get my next paycheck and when i've done enough comparative shopping, i'll invest the money. As for growth, line up the next day shot, is that a good amount of growth for any kind of plant regardless of what it's being fed? It may not be the best, but it is noticeably bigger. I'm sure a chemist can back me up on this one that piss is just as good of a source of ammonion sulfate (something that turns into nitrogen given oxygen) than any other product, as long as the nutrient levels stay in a proper range, it doesn't matter if you use a special blend of vomit and blood or a mixture sold to you by a reputable company... although i wouldn't reccomend using blood and vomit, who knows, it might work.. as long as the plant is getting the right kinds of nutes. Obviously, the companies mixture is tried and true, and easier to work with, but im saying it can be done, and it looks to me like it is for now.