I don't grow succulents myself, so can't answer your question.
But I know that isn't a pepper plant!
You posted this in Vegetable Gardening > Pepper Forum
We have a Forum (section) for Cacti and Succulents here : viewforum.php?f=38
If you post your question there, it is more likely to be seen by people who do grow succulents and might be able to answer your question. Put a more specific title on it also (your "sick plant" title gave no clue that you weren't talking about a pepper plant). Perhaps "succulent (or hen and chicks) with yellowing leaves"
Welcome to HelpfulGardener anyway! I hope we will be able to help you!