Hi this is Peggy. Here are some ways to clean the hard water ring from your toilet. 4 Ways to Clean a Ring in Toilet Bowl - wikiHow
Rating: 80% - 5 votes
No matter how hard you try to keep your toilet clean, your porcelain throne may end ... The pumice stone acts almost like a pencil eraser, removing hard water rings before your eyes! ... In fact, used dryer sheets work a bit better than new ones!
The Works is good Dollar Store like 2 bucks
Our family has used CLR in the past, and it has worked well. Good luck!
I like a pumice stone for hard water stains in the toilet.