Anders

So this could work (see picture)? It is burned clay. Judging by it's color it seems to contain some iron? 23 USD for 15l (4 gallons) isn't crazy expensive. I guess I should pack the material pretty tight in the bag to ensure that the water mostly passes around the bag and not through it?

Hi!I´m planning to try out a BCB bag (caught the idea from Dr Novak) in my sump.But I'm having the hardest time finding claybased kitty litter that is NON-clumping (baked) here in Sweden. There is a few option for the clumping kind made from 100% clay, but by my experience that doesn't work.The kitty litter turns into a "mush" that clouds the water, asi it seems, indefinately...Is there any alternative to kitty litter? And is it just a matter of CEC?Thanks!/Anders