Well, this is not a media. Algae is due to nutrients in the tank. The best way to combat it is to vacuum the gravel and do partial water changes. You may want to do small changes a couple of times a week for a bit. Also, make sure your lighting is okay. There are different types of algae, and lighting can cause some of them. If you have a fluorescent fixture, replace the bulbs every 9 months. If it is near a window, block the light from the window.
For media, you can either add a second cartridge or fill the media container with bio beads, filter floss, or something similar. Phosphate pads can help too, and can be inserted in front of the filter pad.
Date published: 2018-03-20