There is limescale in the toilet, how to clean it, my toilet is usually flushed with groundwater

Try salty sweet oranges, which are seasons oranges that are castrated with salt. The toilet basin of the rental house where I live has accumulated N years of old stains, and it is ineffective to use any toilet cleaning liquid, and finally dealt with a jar of salty mandarins, which was moldy and poured into the toilet, resulting in siltation, and the water rushed into it went very slowly, and the toilet basin soaked the orange water for a few minutes, and then the brush was not brushed, and the stains were gone. You can tear the mandarin orange at night and spread it on the stain and wash it again the next day, it should be effective.

Salted sweet oranges are sold online.

Isn't sulfuric acid good? Are you using a diluted girl? You use 100% sulfuric acid to see if it's good or not, and Russia won't be able to believe in it.

Sulfuric acid, hydrochloric acid, and powerful toilet cleaner won't help you.

You only have one way to go: change the toilet.

The pipeline is unblocked, and the detergent is sold in major shopping malls, and it has instructions on it, so you can do what it says. Very effective.