Reusing light recipe.

Hi, I’m still an unexperienced grower, but I just grew a few plants and I was wondering how to go about reusing the soil, I will have a 3 gallon and 3 5 gallon that are going to be done in the near future and I was wondering how to go about reusing it. I thought about a compost tumbler and using worms but I’m not sure if it would mess with the balance of the nutrients. I own craft blend, buildawflower and buildabloom as well as some other producst from other brands for more targeted stuff as calmag. How much craft blend per gallon should I use and could I use the buildaflower as wormcastings?

Pic is mostly for attention.