Yep, I considered getting a filter for that system you gave me, but can you imagine that black silt or carbon hitting it? It would ruin the filter immediately, I think. You could literally scrape the black gunk up off the bottom of the tub and it stuck to your fingers like charcoal. I was so glad I wasn't washing my hair...getting it off my face woulda been hard!
Sounds like OT knows what it is...carbon used for treatment.
Heh...the carbon gets a lot of stuff out of the water. It's supposed to be allowed to settle out or filtered out before it's released.