 which is a cleaner, you know, calcium lime rust and that type of cleaner, get it in that, pour the whole quart bottle in the bowl, let it sit overnight, and then flush that away. That's a real good cleaner for toilets also. Gary, but some of that black looks like it's inside, you know, like the ring, you know, where the water comes out of the bowl. Is there any way to, you know, get that out?