Bleach is very effective for the toilet,just pour it in and leave it for 10 mins and scrub!

Straight bleech

A power cleaner with bleach if it’s real stubborn. Bicarb soda left to soak may also help…depends, the stain may be permanent by now…

white king is really good but really fumey so be wary. it would be good for getting it white but too strong for everyday use.

If your toilet is plumbed to recycled water(grey water) it stains the toilet bowl terriibly. The block of units I live in has this problem. None of the normal toilet cleaners got it off. We got a professional cleaner in. They use CLR which the put in a spray bottle so you don’t waste it, and rub the stains with a cheap mitt (not steelo) – some people who hand wash their dishes use them ( don’t use a good quality one as they are too abrasive and will scratch into the surface of the bowl. Flush your toilet and you may need to repeat the process. We as neighbours had tried various toilet cleaners. Between us I think we had tried every good brand, even tried cleaning them daily using a good quality toilet brush with the cleaner.

mom153507 – I have used Harpic too and it does work well.

I have always used Harpic and its always done the job.
Give a good scrub, repeat several times if need be.
You can also buy a under the rim toilet brush to get that area clean as well.
Good luck!

I did get a product from Bunnings – do not recall name – maybe check with them?