My set-up is different than what you mentioned as well lol
I have about 1" of carbon on the bottom, then a big wad of filter wool, then a properly cut piece of filter polishing pad on top before the cap goes on. Everything get discarded except the polishing pad every few weeks, I use the pad for a media![]()
The issue I see with this is that if you are tossing all that when you clean the filter you must be having a mini cycle every time. I am only saying this for your own good. I would add some scrubbies so you have more media which you keep long term. If thats the only filter on the tank you are throwing away 80% of your beneficial bacteria colony every time you do a cleaning. Just something to consider.