Thanks guys. I'm a civil engineer so I've seen first hand the damage that dumping non-organics can do to a city system so I have a hard time doing that but thanks for the input. How do u guys rinse without losing it all drain?

Don't rinse too much. With GFO it looks awful but I do a couple swishes with RODI and that's all. Tank goes a little brownish for a couple hours and then it's fine. My carbon only takes one rinse to make it dust free. (Rox .8)