was the biochar charged before you put it in the soil? I made my own biochar and charged it myself... and the test run i did with the mix was awesome. the plants were definitely superior. i ended up having to just mix that particular mix with the rest of my soils, but i'm going to be making more char soon for a second test batch and i'm looking forward to it. the plants that had the char had bigger nugs and grew wider/taller than the ones i tested against it. the only diff in the mixes was the char. I need to make some more soon and get it in all my mixes. i've just had too much other shit going on. do yourself a favor if you have PM indoors, and get yourself a sulfur burner (it vaporizes not burns) and some sulfur prills off amazon and vaporize that shit in your grow. it will sterilize the environment and sulfur in large doses is highly antifungal and the plants will absorb the sulfur from the air and it will get rid of PM even in the stem tissues. It takes more than one application but let me tell you from experience... it's the only thing that actually works (other than eagle 20 but fuck that shit). i blasted my flower room when it was empty, and i blasted my veg room full of plants. then i blasted the flower room about 2 weeks into flower with the plants in there. i blasted the veg room again after that. I have been mildew freeeeeeeeeeeeeeee. it's been so nice, i fought that shit for a year... IT SUCKS, the sulfur burner was the only thing that finally did the trick.