I've read about it, but have never done it.
If I was going to, I'd probably go with the molasses that they sell at the hydro store first until I got the hang of it.
I just did the Mollasses thing and I have a bubble ponics set up but shortly after I added it all the leave started turning yellow. I dont know that this was because the Mollasses or it is because closer to being ripe-' or even something else?