Hi
@Sebino! I've been using BioBizz for a while with autoflowering strains and had successful results with the following nutrient schedule: http://www.420magazine.com/gallery/data/500/Untitled124.png. As you can see, BioBloom + TopMax are being used until the last week of flowering, before the flush. Then they suggest TopMax during the flush but I rather like giving plain pH'd water. Try to stick to this schedule, you should have beautiful and well ripen buds. Now about the used soil, I like to use it for my vegetables, but I won't recommend any recycling operation for growing weed again, this usually lead to various issues and you better spend a few dollars on a new bag. Hope this will help, keep us up-to-date and happy growing š