How to remove limescale from toilet below waterline

by Sam Wood | Last Updated: 06/11/2020

Our favourite way of removing limescale from your toilet

How to remove limescale from toilet below waterline, our complete guide and easy method! Limescale can be a real problem for your toilet bowl. Once it starts building it can be very difficult to get rid of, and it looks horrible. It forms in big brown crusty sheets. But don’t panic yet, there is a really easy way to remove limescale that forms below your toilets waterline using a readily available toilet cleaner.

Reviewed!
Harpic Power Plus Max
£14.30
  • Eliminates 99.9% of bacteria, including the E. Coli & Tota virus
  • Cleans with the power from bleaching agents and baking soda
  • Powerful radiant cleans your toilets and leaves and natural Glanzendes White
  • Removes limescale and urine as well as unpleasant odours
  • A must for every household


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06/14/2021 02:29 pm GMT

Check out the harpic power plus review here.

Before Cleaning the toilet

Yeah, its grim, safe to say we have found a good test subject here for the Harpic power plus. Let’s get some down there and see what effect it has on our brown limescale stains. This highly rated cleaning product has been specially formulated to be an effective limescale remover. So let’s chuck it down the toilet bowl and see what effect it has on our limescale deposits.

During applying harpic power plus

So we have poured it in. It’s quite thick and I don’t know why but I wasn’t expecting it to be blue.

During cleaning with harpic power plus

After brushing with a toilet brush

So we let the power plus sit for a while before attacking the toilet with a toilet brush. We have then decided to let the formula sit again for a while before we flush it away and reveal the result. The limescale mineral deposits are really tough to remove, so leaving the limescale remover in the toilet bowl between scrubs is a great way to improve its effectiveness.

After First Clean

After First Clean

Its definitely done a job. I think we would be expecting miracles for it to have completely cleaned the limescale deposits from this toilet on the first attempt. This method is brilliant because it doesn’t involve tons of elbow grease to clean the limescale off your toilet bowl.

We chucked the remainder of the bottle down the toilet and decided to leave it for the rest of the day to see if that would finish the job off. These limescale stains were tough, but this toilet cleaner is really doing well removing these calcium deposits.

After Second Clean

After Second CleanReally good result, the toilet is almost there. Just a tiny bit more to come off. We think with a good scrub with the toilet brush this job will be done! That completes our simple guide for how to remove limescale from a toilet below the waterline, read on if you want to learn more about limescale and understand why you may be suffering from it in the first place.

Related Questions

What is limescale in toilets?

Limescale is a hard chalky deposit, consisting mainly of calcium carbonate (CaCO3). It can go brown due to iron content in your water, this is what commonly happens it toilets and is why it looks a horrible browny colour. Hardwater causes limescale build-up. Hardwater just means water that is full of minerals including calcium and magnesium carbonates, bicarbonates and sulfates. Hard water is formed when water seeps through deposits of limestone and chalk.

Why do you get limescale in a toilet?

Beyond living in a hard water area there are other reasons why you may suffer from limescale build-up in your toilet whereas next door may not. The enamel layer on your toilet normally protects against limescale build-up. It only begins to build once the enamel layer has been damaged.

Bleach can damage enamel and strip it from your toilet, this will then allow limescale to start to form. Other abrasive cleaners can also be really bad for the enamel. Because the limescale is formed by the water in your toilet it normally appears under the waterline. That is why products have to be designed to removed limescale from toilets specifically below the waterline.

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Wood by name, wood by nature. I am a fully qualified, time-served, award-winning joiner with an NVQ Level 3 in Carpentry and Joinery as well as an HNC in Construction. Beyond my joinery qualifications, I have also earned a degree in building surveying. I believe these qualifications make me perfectly positioned to provide expert advice on many different areas of DIY as well as share all of the tips I have picked up in over a decade working on building sites!