I’d suggest scrubbing it with a wet pumice stone because it’s not gonna just go away, but once you do get the ring out you can use something like Zep acidic bowl cleaner to maintain.

You need a gel toilet bowl cleaner in a bottle that contains Hydrochloric acid. Squirt it under the rim, let it fall. Squirt on the bowl, all the way around just above the water line. Leave it for a while to work, then brush off.

You could also 'push' the water out of the bowl with the brush which will lower the water line. Put gel cleaner directly on the minerals/water line.

To be clear, I am NOT talking about those gel stamp things.

Gentle scrub with a pumice stone should do the trick. Before I had a water softener I always had to do this about once a month. 

No. However, if you shut off the valve and then flush it and your toilet level doesn't come all the way up to the ring when you do that you might have some luck with something like CLR, but it's not going to do any good if it's diluted by the water in the bowl.

If you shut off the supply, you can sometimes get enough velocity with a plunger yo significantly empty the bowl. Depends on the p-trap.

You could also bail the water out. If you're especially squeamish you could put a bleach solution in there for a little bit so that when you do have to bail the next flush in order to get a product to work on the dry bowl, it would be sanitary.

You will need to do a strong acid soak overnight to remove the hard water ring. As for cleaning toilet I'd scrub it once a week. My favorite easy solution has been the Clorox magic wand.

I use drywall sanding screens/sheets, 220 grit for hardwater and tougher gunk in toilet bowls. It wont scratch as long as the screen/surface is wet. Easiest method ive seen so far

This is a job for a pumice stone.

Pumice stone. Make sure stone is fully wet as well as the area you will be scrubbing. So easy and no fumes.

Toilet rock, it’s like a pumice stone for your feet but for toilets

Zep Acidic Toilet Bowl Cleaner. Let it sit for at least an hour. Clean. Repeat. Clean again. Then, whatever is left, go in with a WET pumice stone in circular motions, tiny - not across. The cleaner will remove 90% of that buildup, the pumice stone the other 10%. Dwell time is SUPER important on this one. Let the cleaner do what’s it’s meant to do. Make it work for you!

Pour CLR or Muriatic acid down the overflow tube. Wear gloves and face protection. It takes a while for either to work. Pouring down the overflow tube will help clean out the holes under the rim. Mine were so full of hard water deposits that I had to use a small allen wrench to scrape the calcium build up out.

I use a toilet brush with Clorox cleaner once a week or so.

Brush - https://images.app.goo.gl/ouVa78Cv8MxXqXHc8

Cleaner - https://images.app.goo.gl/tz6H1Gy4N11kN2wb7

Depends on just how bad it is. We have seriously off-the-charts hard water here, and one of our toilets had calcium buildup in almost every single jet. We dried the hell out of it, taped over the jets, then poured about a half bottle of CLR down the fill tube and let it sit for a couple hours. Even then, it didn't eat through much of it, we still had to fashion some improvised pick tools out of sharpened hair pins and scrape the buildup out of every jet. Two hours of absolute suck-- but hey, my toilet flushes again!

Usually the gooseneck on the bottle of toilet cleaner can be angled so that you’re actually spraying up a little bit under the rim. Let the toilet bowl cleaner sit for 10 minutes and then scrub the bowl with a toilet brush. Some brushes will just have a round brush head, like a large bottle brush; others will have a section of stiffer brush pointing back towards the brush handle for cleaning under the rim. Either way, you should be able to maintain a clean bowl.

Be careful with products that go in the reservoir tank - they can degrade the flapper and prevent it from sealing properly, so your toilet tank winds ip constantly cycling (this will contribute noticeably to your water usage). Most of those things, like the little blue bleach pucks, assume that a toilet is being flushed 3x a day or more. If it’s not flushed more regularly, the solution can become corrosive.

We have a clean flush toilet at work with the little flap thing that directs the water around... It does do a better job of cleaning the bowl. As an IBS sufferer, that's great. But I have on occasion splattered the damn flap and it doesn't clean itself.

We got the standard Luna in our recent reno. The rimless ones look pretty good but went the standard option. It's in a laundry not our main toilet. No big deal.

Not sure if they changed the design, but the rear two rubber bumpers under the seat that are supposed to cushion and contact the bowl did not sit on the bowl at all, so every time you sat down it levered the lid away from the cistern and when you got up the lid would bang against the cistern. It would have cracked that fitting eventually. Really annoying. Got a Caroma guy out to fit slightly taller bumpers which fixed it.

For a reasonably priced against the wall toilet, they're pretty good. Not a particularly comfy seat, but it does the job.

I have one and adore it, they are so so much more hygienic and cleaner and slightly higher which my back issues love

Got one. Would recommend for sure.

Got a Estilo rimless for $149 from Bunnings, great for the price. Cleaning is much easier and even safer as I don't have to crouch to look under the rim. The soft close seat is shit but not damaging, flush power has slightly declined over 3 years but it gets the job done. Overall it's a solid unit, like many I've dropped into it.

I have had a Duravit Durastyle wall hung rimless toilet for a month now.

Very impressed so far, comfortable seating position and nice wide square design. No issues with flushing, i even place the supplied flush flow reducer gasket between the pan and flush pipe.

A strong flush is a good thing. If it doesn't clear skidmarks you're going to need to reach in with a wad of TP and wipe them off. That gets annoying after a while.

I've got a crosswater wall hung one (from drench.co.um). The flush was so strong I had to fit a baffle. Once that was fitted worked perfectly. If I was to fault it, then it does sometimes splash a bit.

Easier to clean, (well so I'm told) when I do the ensuite I'm fitting the same again.

I'd suggest not a good idea to cheap out though.

I agree with your plumber, I'm also a plumber and think there a gimmick.

From our apartment maintenance: bleach in water tank. Just a dash.

If you can get them, a magic eraser may take the blue marks off. Just wet it, wring it out and try it.

If not, probably a bit of bleach in the tank like the other commenter said

Wear a glove and use fine sandpaper with water and scrub gently. It will go away and won’t ruin the ceramic

I’ve used a scotch brite copper scrub pad, might get the job done, will need lots of elbow grease though

Vinegar and CLR. Did this recently and it worked like a charm. Let it sit for about an hour.

Pumice stone will often remove these stains without damaging the surface

Looks like it's just rust or flaked off.

I love removable toilet seats. It's so satisfying to be able to clean all that gunk out.

I'm always scared I'm gonna break toilet seats trying to take them off. Do you just pull them right off or what?

I don't think it should be added on as a few, but may be something to include in a deep cleaning v regular cleaning

If I can take it off in a couple quick seconds ima do it every time 

Yeah maybe for a moveout

Zep professional grade toilet bowl cleaner and/or a pumice stone

There was another thread about this recently that said to leave citric acid in the water overnight, and when you flush it in the morning, most of it will go away. I bought https://a.co/d/f3uomyc and it worked! I left it overnight, flushed in the morning, and did a little scrubbing with a brush after. It was like new!

Before you try anything else try a whole pack of cheap denture cleaner tabs. They work surprisingly well.

Muriatic acid works...scoop out the excess water and pour in. Let sit for several minutes, and be prepared to scrub. ALSO!!!: Wear rubber gloves and long sleeves. A MASK TOO!!!. Best to hold your breath! Then scoop out and put into glass jar with lid. It works!

I’ve been successful with cleaning vinegar over night

lol people acting like supermarket muriatic is like a deadly virus.

Just close your eyes while you pour it and that’s ok. Leave it for a few hours and then flush and scrub. Works every time

Bowl for this issue, and I did separately use it in the tank and it flushed a lot out of there too. Takes a few flushes to really get everything out of the tank

Don't use pumice stones, they may get the stain off now but they also destroy the porcelain (glass like) coating over the white ceramic bowl. They are like teeth, there is a white base and a glass looking thin coating. that glass is what keeps the white part white, scratch that and moisture and bacteria get under it then the toilet will never be clean again.