Time for your septic system Fall maintenance. Bio-Desolve is a revolutionary, all natural septic treatment product (no chemicals) which not only treats the septic tank but unlike other products also treats your septic bed. Approved by the Ministry of the Environment (MOE) for use in septic systems. All you need is one (1) litre per person. A 4-litre jug is $35 plus HST. Gives us a call or send an email.