I put azomite in it...algae needs co2 to live.. right? I'm thinkin' maybe some soda water splashed in might not hurt...I'll experiment with a couple jugs...I was also thinkin' it might be good to infect the jugs with some health food store stuff; like spirulina, or dried algae supplements....who knows how viable those would be. I just see it as being ultra- 'green manure' as the old farmers call it. this'll be a long slow thread until I actually have full on swamp water...if it doesn't work well on the plants, I'm sure it'll be dynamite cooked in the compost pile.