When Should You Use A Chelator?

Chelators are underrated, in my opinion. They can help your formula out in more ways than you would think. For a refresher on what chelators are, check out this post (link). In this post, I want to discuss when and when not to use them. This is something I knew about, but did not know how to use until after learning about them in general chemistry. It is coordination chemistry, if you were interested. It is quite interesting for me, but I don't know if you what to learn about it. Let me know in the comments below. I would love your feedback.