Anyway one of our toilets has a brown stain in it, over ti.. Descaler. yes, last time i looked i didn't use the toilet bowl to percolate my coffee.:)).
Apply some muriatic acid over the stained areas with a sprayer and leave it to set for at least half an hour. Remember to wear rubber gloves to avoid direct contact with the chemical. Once the acid has been given enough time to set in, you should be able to easily scrape off the stains with a scourer or toilet brush.
The toilet bowl cleaner that does it all: removes lime scale, eliminates odour and dissolves stubborn stains. Just a small amount applied regularly keeps toilets .
Supermarket shelves house a huge variety of products that clean your toilet very effectively. There are foams, sprays, tablets, cages, stick-on buttons and ducks.