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Do Loo Cleaner Tabs have a fragrance?Updated 9 days ago

TL;DR: No added fragrance. Loo Cleaner Tabs contain no perfumes, no synthetic scents and no masking agents, and the formula is Sensitive Choice approved by the National Asthma Council Australia. You will still notice a faint fizz while the tablet dissolves, which most people describe as mineral, like sparkling water. If you want a scent, add 2 to 3 drops of essential oil to the bowl, never to the cistern.

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Do Loo Cleaner Tabs have a fragrance?

Koh Loo Cleaner Tabs have no added fragrance. The formula contains no perfumes, no synthetic scents and no masking agents, and the cold water-soluble PVA film around each tablet is unscented too. Most mainstream toilet cleaners lean on heavy perfume to cover the smell of their cleaning agents. The oxygen-based formula in Loo Cleaner Tabs is low in odour to begin with, so there is nothing to cover up. The tabs are Sensitive Choice approved by the National Asthma Council Australia and certified by Good Environmental Choice Australia (GECA). People vary, so no cleaner suits every household, but a formula with no added fragrance is generally a safer choice in a scent-sensitive home.

✓ Nothing added to cover anything up

No perfumes. No synthetic scents. No masking agents. The oxygen-based formula is low in odour to begin with, so there is nothing to cover up, and the cold water-soluble PVA film around each tablet is unscented as well. Sensitive Choice approved by the National Asthma Council Australia, and certified by Good Environmental Choice Australia (GECA).

On the sensitivity question, people vary, so no cleaner suits every household. In general, a formula with no added fragrance is a safer choice than a heavily perfumed toilet cleaner if someone at home reacts to scent, and the Sensitive Choice approval is the specific substantiation behind that.

No added fragrance No perfumes Sensitive Choice approved GECA certified

What does the bowl smell like while it is cleaning?

You will notice a faint fizz while the tablet dissolves in the bowl water. Customers describe it as fresh and slightly mineral, close to sparkling water. It is not perfumed and it is not sharp. Once the solution has done its work and you flush, the bowl is left with no lingering scent at all. If you have moved across from a chlorine bleach toilet cleaner, the absence of a strong smell can take a few cleans to read as clean, because bleach has trained most of us to treat scent as proof. Add essential oil to the bowl if you would rather finish with a noticeable scent.

✓ A faint fizz, and nothing after the flush

The fizz smells fresh and slightly mineral, close to sparkling water, and it is gone once you flush. If you have come across from a chlorine bleach cleaner, the absence of a strong smell can take a few cleans to read as clean. Bleach trains you to treat scent as proof of a job done. The bowl is still clean, it just does not announce itself.

Faint fizz Mineral, like sparkling water Not perfumed No lingering scent

Can I add my own scent to Loo Cleaner Tabs?

You can. Add 2 to 3 drops of essential oil straight into the toilet bowl alongside the Koh Loo Cleaner Tab. Both Koh oils work well here: Eucalyptus Oil is fresh and clean, and Lemon Scented Tea Tree Oil is citrus-fresh and the more popular of the two. Two to three drops is plenty for one clean. More does not make the scent stronger and can leave an oily film on the bowl. Drop the oil in at the same time as the tab, let both fizz and dissolve, scrub, leave it to sit, then flush. Bowl only, never the cistern.

✓ How to add a scent

1

Drop the tab in the bowl and add 2 to 3 drops of essential oil at the same time.

2

Let both dissolve and fizz, then scrub the bowl and under the rim.

3

Leave it to sit, then flush. Two to three drops is plenty. More does not smell stronger and can leave an oily film.

Koh makes two oils that suit the job: Eucalyptus Oil and Lemon Scented Tea Tree Oil. Any essential oil you already own works the same way.

2 to 3 drops Eucalyptus Lemon Scented Tea Tree

Can I put essential oils in the toilet cistern?

No. Keep essential oils out of the cistern tank. Oils do not dissolve in water, so they coat and build up on the rubber seals, the flapper valve and the fill valve inside the cistern, and those parts degrade or warp over time. That means leaks, a running toilet and a plumbing bill worth more than a year of toilet cleaner. This is different from the tablet itself. A Koh Loo Cleaner Tab can go in the cistern, because it dissolves cleanly in water and rinses through. Essential oil does not. If you want a scented clean, use the bowl method and keep the cistern free of added fragrance.

⚠ Keep essential oils out of the cistern

Oils do not dissolve in water. They coat the rubber seals, the flapper valve and the fill valve inside the cistern, and those parts degrade or warp over time, which shows up as a leak or a toilet that runs. The tablet itself is fine in the cistern, because it dissolves cleanly in water and rinses through. Oil is the part that does not. Keep oils in the bowl.

Oils in the bowl only No oils in the cistern Protects the rubber seals

Koh Loo Cleaner Tabs 14pk

Loo Cleaner Tabs

Small but mighty septic safe tablets clean your loo without bleach, harsh chemicals & fumes.

Koh Lemon Scented Tea Tree Oil

Lemon Scented Tea Tree Oil

Add a zesty scent to your fragrance free Koh cleaning products.

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Last reviewed: September 2026 · Koh Australia

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