I've been putting off trying to clean my shells with muriatic acid. Acid is dangerous and I was nervous about the fumes and mixing the water and acid. I am really glad I at least tried this. It works crazy good! It's not for all shells as you will see in the video, but for the right shells with the right calcification, it works wonders! I also give you tips on how to dispose of the acid once you're done dipping your shells. It was quite a project but I was really happy with the results and I will definitely do this again.