myPlanetGanja.com

Sounds like a lot of trouble to me to grind up all that charcoal? Much less make it? Can we contract this out?

Or! If we just buy a lot of cheap coffee grinders? Then hire lots of "Guadamanian grinders."

I grew up around coal. Thats some nasty stuff to grind up. Dust masks boys and girls.

no need to grind up anything - it comes already pre-formed as pellets ! imagine that ... WOW ! in sacks of 10 / 20 / 25 / 50 / 100 etc kgs !

how often do you have to refill?

I've used mine for 8 grows, since i don't use it until into flower when the smell is noticeable, for each grow about 600 hours per year. There wasn't a problem on my last attic grow.
Wow, I’d hadn't realized till now just how well it was holding up. Purty cool.