It is unavoidable in the case of your grow tent arrangement. You should have a filter in your grow room for a lot of different reasons. There isn't even a single reason to not have a filter in your room! So, if you don't have this device, your plants won't give you what you expect at the end. Go ahead and put one in your plants to make them happy.
It's common for carbon to be used as a medium in water filtration processes. When you buy a whole-house or whole-home water filter, you almost use carbon filtration in some way. This is true for almost every water filtration system. Carbon filters for water filtration are made by grinding up a carbon source and making a paste.