Hey just started my first run in coco and after a lot of reading it seems canna coco and most high-end bagged stuff was good to go out of the bag? At least not necessary to rinse salt or dust off, just water with your solution and plant. I was only able to get floraflex locally but it claims to have an ec <0.6 and doesn’t have any dust in the bag.
Anyway probably doesn’t help you but I was stoked to see this thread since I came across @GramTorino in every coco/jacks search… lol. Now I have 1500 more posts to read 