Total Newbie here
So let me get this straight, if you replace an old filter with new you destroy the cycle. You cut the mesh off of the top of the old filter and put it ontop of the new and it transfers/allows the bacteria to grow on the new filter.
When you rinse it off, I run it under a bunch of hot water and try and rub the gunk off, would it kill off any of the old bacteria?
My filter unit looks like this.
So I can cut the old filter material off and add new carbon to the bottom and replace with new material. How often should this be done?
I'm sorry for intruding in on you post with questions, this is totally new information to me.