If you get a canister or any filter that is rated for a bigger setup then you will be able to do less maintenance. I got the Marineland C360 because it seemed large compared to other filters of its size. With polyester batting there are several thicknesses and densities you can get it in. I use the thick stuff because i have no fish and I am trying to get micro particles out of the water right now. But you can put in a small layer in and still have good flow.
I still have the question of what is clogging up your filter. Is it plant debris, fish poop, substrate stuffs, algae? What goes into the filter may also help you figure out how to reduce the amount of work you need to do each week. But changing a layer of batting 1-2 times a week isnt too bad. You could alternate which side of the filter you change too. v0v
Have you ever seen a French Ninja? NO because they are sneaky.