For sure, although my question is why people would boil their rocks to remove them? Are they so difficult to remove that they must be killed?As long as you don't plan to boil your rocks you will be fine. These are a great colorful, generally easy to keep, sadly with a bad name attached to them because a few people choose to boil their rocks. Don't be afriad, there is a reason these are listed as beginner friendly for being so "deadly."