I like to use Alfalfa, Neem meal , kelp meal, insect frass weather it be Black soldier fly or meal worms frass, crushed or flour oyster shell along with the Bokashi , table scraps ,leaf from harvest and trimming and after I brew a batch of tea I put my tea contents back in the bin my carbon input is either Bio char well just char I should say I don't charge it i let the bin do that and I use saw dust or coco coir I still amend the bed regular with my dry inputs