You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser.
I have this setup on a 46 Bowfront. I don't think I'll be changing any of these filters for over 1-2 years.
The tank,
By the looks of the lines, you already need to start the cleaning.
One at a time, one a week.
Now you are never gonna get free time.
-Aaron