Just an update on that gonzo stuff. After searching everywhere, I found the equivalent of gonzo here in Canada. It is called envirozorb, and it is the same stuff as gonzo. Here is the company's summary:
Envirozorb odor control products is a naturally occurring mineral formed
through volcanic activity millions of years ago. The minerals are molecular
sponges with large internal cavities where molecules can be adsorbed. The
ability of these molecular sponges to attract and sort molecules is also
affected by the electrical charge or polarity of the molecules being sorted.
Odors have positive charges Envirozorb products have negative charges. And
the good news is opposites attract! What it also means is that when a
stronger attraction (sunlight or fresh air) are introduced the attraction is
reversed and the odor molecules are released. This allows for our production of
consistent and highly effective products that can be used over and over again.
Anyway, just in case people are thinking that this stuff, and this stuff alone, will wipe out cannabis odours, well, think again. I have four bricks of envirozorb in my walk-in closet where I'm currently growing 4 Super Lemon Haze. The plants only vegged 3-weeks, so they aren't big. They are in week 7 of flower, and there is no way that stuff would be enough. I have two 80 cfm fans venting into the attic (w/carbon filters), and I can still get a whiff of the pot in my house every now and then. Without the two fans and just the envirozorb it would be over-powering (yes, I tried it with just the envirozorb and it took about a 1/2 hour for the bedroom off the walk-in closet to stink badly).