I have the exact same tank. To save money, I just took the eclipse filter pads and carefully cut around 3 edges, leaving it connected on 1 side. Then I place rubber bands or plastic coated sandwich ties around it. When it gets dirty, I just open it up, dump out the resin and rinse the pad with my sprayer in the kitchen sink. Then I replace whatever stuff I decide to load it up with, if anything, and drop it back in the tank. So far 3 eclipse filter pads have lasted about a year and a half. No sense in throwing away your money if you don't need to.
Two 1 GA desktops, a 5 gallon, a 2.5 gallon, a 10 gallon, a 20 gallon, a 25 gallon, and two 75 gallon tanks, all planted.
I am an expert on algae, so ask me if you have questions. I know how to grow it, just not how to get rid of it.