I currently have a Greenway (Sanitizer) system which has CR-100 zeolite and KDF-85
in a 10x54 tank with a Clack valve.

I'm now back to the original problem which is .....If I open a tap, the water has NO smell for 40 ounces than I get a smell for the next 40 ounces
and than OK for as long as I draw water. And this scenario repeats itself very constantly.

Somehow these media works, otherwise I would get a constant smell just like before I added the KDF ????

No slime in toilet tank.

I'd like to get and understand the origin of the smell....before I get to any modification.