Man, I got a bag of buds grown with gravity once.. 1/4 looked like an 1/8th, and lasted about as long as an 1/8th. I told the dealer I didn't want any more of that shit.
Who the hell knows what chemicals are really in it (paclobutrazol?).. Fly-by-night companies that make ferts for illegal grow ops aren't always reputable. Go figure.
That's my opinion, at least.
Shoot I just harvested with gravity and it's fuckin rad I think. I grabbed a few choice nugs and weighed em after I dried it real quick in a CFL light and what looked like a dubsack weighed in at 2.6g. Nugs barely lined the bottom of a sandwhich baggy. If it growing for production I think it's the shit. We harvested way more weight with it than I would have imagined. Nobody can bitch cus it will " weigh" out. Lol be careful I hear u can lose a crop so be conservative. I used 7mL for 4 large soilplants. Which is about 1/3 of the recommended dose.