i've only been using it for a few months... this is my first grow using it - it hasnt seemed to hurt the plants at all by leaving any residue or anything in the res or planters...
it seems straight though - i mix mine to the light cleaning on the container, dont just use the concentrate - it will last for a long time.
i havent heard anything bad about it yet... but i'm always listening
While it smells funky as all get up, it's good stuff and if rinsed well will leave no harmful residue. Awesome for cleaning boats and vinyl siding too!
I've been unemployed for many months and just started up a new company. My better half found out long ago not only do I clean really well after being bored two months and smoking some Kali Mist, but I sweep more often, paint, insulate attics, hang drywall, install lights and fans, and mop. Unfortunately I localize my work to a 100 square foot area.