Calcium white build up on surfaces

[Thai Bart]

Good afternoon oh wise sages of B.E
Does anyone know if Thailand has cleaning products that will dissolve lime scale build-up . I remember a product in the U.K called Calgon, specifically for this type of problem. It is basically clouding over the dark tiles. You could also put a tablet into your washing machine to dissolve, if that is the right description said build up.
Names and bottle colours will help me find them IF they exist here.
Cheers Bart

[Freddy]

Try white vinegar mate. Use an old spray bottle and spray on liberally. Leave it for a few hours. If it's really stubborn you can soak cloth sheets on vinegar and lay on the surfaces you want to clean. Old t- shirts are good. Leave edge dry so you can tape to walk if your doing tiles. Again leave for a couple of hours. If really stubborn then Crocodile make a product called concrete eater/remover. It's around 350 baht a bottle and most DIY shops here have it. . It's a mild acid. I've not tried it for calcium however I had some tile that hadn't had the grout cleaned off in time and it worked really well. You can use diluted or neat depending on severity.
You could also use diluted acid but be careful. Don't leave to long, have water and baking soda mix to stop the acid reaction. That's only if it's really bad and your dealing with sealed/glazed tiles. If you go that route it will shift your calcium build up but you may need to re-do the grout work.

[Thai Bart]

Cheers Freddy