Ring (rust) around the bowl

[Theberrys]

Another vote for pumice stone I use them in my House and they will work fine, as long as you have a porcelain toilet. Don't use them on plastic. This doesn't solve the hard water problem but once or twice a year should be enough to keep it from looking bad

Dick

[Jim A]

Renipladlo,

I replaced the toilet for other reasons, not due to any ring problem. So it doesn't count as the most expensive fix for the problem.

[EngineerMike]

Most expensive solution would be to buy another coach.

Monty- hard to remove iron using filters. You can do it w/ion exchange, but IIRC it takes a special setup to target the iron. You can also do it w/Reverse Osmosis. IIRC you have an Apex which is equipped w/the Vagabond RO system, so you shouldn't have that issue.