From the first shaken fists to the approval of C-45, proponents of legal cannabis have been leaning on the “all natural” clause for as long as legislators have been shaking their heads.

When it comes to harmony with nature, consumers need look no further than one perfectly synchronized, fish-fueled cannabis farm. “We’re letting nature do the work,” says Steven LeBlanc, co-founder, and president of Hamilton-based Green Relief. “We’ve created a perfectly balanced ecosystem.”

LeBlanc is talking about the company’s aquaponic farming method, a system by which fish supply nutrients to the plants through a continuous cycle of energy and waste production—what he describes as a “closed loop”.