Looking for carbon for filters? depends how you want it. In raw small rock form go to Walmart and buy a bottle of activated carbon in the fish department. If you want it in a sheet type form go back to Walmart and in the section where they sell filters for air purifiers you can buy carbon prefilters which normally wrap around a regular filter. So depends on what you are tryong to build. By the way why would you pose for a pic and post it on a website and also show you are from a non-legal state? Just curious is all.