Problem: Septic tank odour

Causes, risks and the biological solution for your septic tank.

Why does your septic tank smell?

Odours occur when anaerobic putrefaction bacteria break down organic matter and release hydrogen sulphide (H₂S). This happens when the bacterial balance is disrupted — after using cleaning products, antibiotics, or extended inactivity.

Biological causes (treatable)

  • Too few beneficial bacteria
  • Bacterial die-off from cleaning products
  • System dormant after vacation
  • Excessive organic load

Mechanical causes (professional needed)

  • Faulty aeration blower
  • Blocked pipes
  • Overflowing tank
  • Broken membrane / filter

CleanWaste restores the balance

CleanWaste contains highly concentrated naturally occurring bacterial strains that displace putrefaction bacteria and efficiently break down organic matter. No chemicals, no excavation — simply pour into the toilet.

Frequently Asked Questions

Solution for your septic tank

Starter

Starter Bottle

Ideal for first-time treatment or acute odour shock

  • 1L biological concentrate bottle
  • Measuring cup
  • Quick-start guide
⭐ Most Popular
Most Popular

Family Bottle

3-month biological balance maintenance for families

  • 3L biological concentrate bottle
  • Measuring cup
  • Monthly dosing calendar
Best Value

Annual Bottle

Full-year proactive wastewater system care

  • 5L biological concentrate bottle
  • Measuring cup
  • Annual dosing schedule
  • System health checklist
  • Priority email support