Mrs Martin’s Probiotic Flush Cistern Block 100g


Who does not like a toilet that smells fresh and clean? This biodegradable, earth-friendly toilet cleaner prevents odours and blocked drains in any toilet. Yes, even an off-the-grid toilet flowing into a septic tank can now smell fresh! The millions of indigenous microbes in this block starts degrading dirt in the water as soon as you flush, keeping your septic tank or local sewage plant working well. Everything else in this block is non-toxic and degrades in less than 28 days so you can rest assured you are doing no harm. Neither to your system nor to the environment.

Directions for use:
Ready to use. Remove from wrapper and place in cistern. Replace as necessary. Depending on how often toilet is flushed, one block can last a month.


  • Completely biodegradable surfactants
  • Gentle and biodegradable fragrance
  • Salt
  • Citric acid
  • More than 10million CFU/ml of naturally occurring indigenous, safe bacteria (Bacillus spp)

Customer Reviews

Based on 13 reviews
Marina T.
The whole bathroom smells fresh!

The whole bathroom smells fresh!

Mariana B.
Flush cistern block

Keeps toilet fresh and clean

Sabine V.


Anmare R.
Flush 110%

I ordered only one flush to test it out. Wow, what a surprise. I am hooked on the product and have re-ordered. Clean and works super efficiently.

We are so pleased to hear you like FLUSH, Anmare! And thanks for doing your bit to keep our water clean.

Beatrix(Trix) S.
This product is awesome

It is highly effective and I can see and smell the difference when we run out. It is also refreshing that it is along lasting product.