My question is geared towards people who use reusable media in net pots either in NFT or DWC.  I was wondering what other people do with the media (ex. hydroton) and net pot after harvest?  Do you pull the plant and whatever roots out that you can and then put it back into the system for reuse, leaving some old roots in there?  Or should the media and net pots be rinsed and cleaned/sterilized lik…