U may have advanced knowledge of how to recycle ur medium.but does the grower in question?..but even recycling comes at cost? Cost of time n money to ammend old soil or just start fresh. Everything has its postive and negatives it finding whats right for u.
Ok...yes u CAN always re-use your soil if ur willing to put in the time an effort but from a beginner stand point it better to refresh your medium when heavy issues occur.
Dont listen to me bro...if u get disease or pest BAD...get rid of the soil it will save u time and money in the end...or keep reusing ur problem? Sound logical??
U can reuse ur supersoil also by adding hygrozyme and wormcastings bud. If u ever do get bugs or mold or mildew or disease..NEVER reuse that soil or anything from that grow cept maybe the pots if u washem good.
If ur worried pre treat ur soil in a rubbermaid with azamax...spray turn,spray turn...get dirt moist but not wet wait 2 weeks then use ur dirt man..mix ur fertilizer with ur azamax and myco or rhizo blast to make a supersoil.