I got a sample of this stuff from the guy at my Local hydro store. It says it is basically Humic Acid. I've looked around for application instructions but i havent found anything useful. SO my question is What does it do and How is it useful? Also how do i use it ? It says use 1.5ml/L in hydroponic but under the other instructions for ornamental gardens it says use every 4-6 weeks? Thanks