At least I think its calcium build up...

There is a lot of build up in the tank, and so it goes out into the toilet so the toilet looks dirty all the time. I've tried sand paper to remove it, but it doesn't work. The only thing that's helped at all was when I had to pour drano down the drain... but it only lasted a few days.

So my question is... what products or how do you remove it from the toilet bowl and tank so that it goes away for awhile?

The most cost efficient way is using Vinegar... I mean vinegar is also known as acetic or ethnic acid, which is one of the many component of those chemical that removes hard water calcium build up in stores... obviously household vinegar is allot more diluted, but it should do the trick when combined with other method. Hence it is diluted; it will not remove all hard water stain...

Next thing is to use 'wet and dry' sand paper - the fine black one from DIY/builder's stores. Start with 600 grit - if that is too slow move to 400 grit, and so on. It doesn't harm the porcelain and removes even dirty rust type stains, it takes a bit of elbow grease but is cheap and you don't have to inhale chemicals and flush them into your sewage/septic system. The sand paper can be kept in the bathroom and used over and over again if you get any more build up. It is not necessary to empty out the water if you don't want to - just use a rubber glove, good luck.

Regards

John

If there is that much calcium build-up, you migh consider installing a water softener. Have the iron levels checked, so you know which system to install.