Hey, I've heard of people mixing some salt in with their water to increase yield. I haven't researched the chemistry that goes into a stb tek yet, so wouldn't understand the science behind it. Has it in your experience increased yield(which obviously you must believe it does), and if so how much salt would you recommend for 1250 ml of water? Also, where is a good place to learn the chemistry behind a stb tek? right here on the site?, im goin to look now. Haven't explored i the wiki section much so i suppose ill check that out now.