Right now I just have 2 filter pads
1st pad is blue on white on one side and a finer blue on the other side
2nd pad is a much finer pad
Then I have my skimmer in the sump, would I benefit at all from having a bag of carbon in the sump or a carbon pillow under the filter pads?
When washing the carbon it never seems to come clean, is it because I use the moderate to cheap carbon?
fish/invert only if that matters.