I'm gonna go to my local hydro shop to pic up some Liquid Karma after that was suggested to me by a few peeps on this site. Everytime I go there, I see this stuff called Sweet, but I have no idea what it is. Some sort of additive I suppose. Anyone ever use this stuff? What is the purpose of it? What results did you have, and most importantly, should I actually buy some of it?

Any info you guys (and girls) have would be much appreciated.