hey everyone, I'm about to mix up a new batch of no till soil and I have some questions. I am about to switch from growing in a 3x3 bed to using 25 gallon pots. I am allowed 15 plants, so I am going to mix up a ton of soil, about 50 cubic feet. I plan to reuse what I already have. It is a no till mix that has been through 1.5 cycles about 6+ months. It's had worms tiling through it the entire time, so this 9ish cubic feet is going to be apart of my "humus" portion. The mix will be as followed; 20 cuft coco 15 cuft lava rock 15 cuft humus (current mix+ 6cuft fresh EWC) 5cuft Biochar For amendments I'll be using per cubic foot; 1c Kelp meal 1/2c Neem meal and/ or Karanja 1/2c crab meal 1c Oyster shell flour 1c glacial rock dust 1c gypsum 1c Basalt Lots of malted barley powder. Small amount of green sand A couple questions; how many cups of the amendment product should I expect to get out of a lb of material? Say I buy a 25lb sack of kelp meal, should I expect around 75 cups worth? Also, any benefits to adding sawdust in the mix, if so any particular kinds and how much? Anything else worth adding? And finally, anyone in the Seattle area have recommendations to where to buy this stuff? I bought most on Amazon for the last mix and it was a bit pricey, I'm trying to save money. I am getting biochar, lava, and EWC locally. Thank you everyone!!