Yes, there are several ways you can modify your sump tank to improve its ability to collect debris:
Mechanical Media: You could consider adding more mechanical filtration media to your sump. This could be in the form of sponge pads, filter floss, or even ceramic rings. These materials can help trap smaller particles that the cotton wool might miss.
Filter Socks: Filter socks are another option. They are made from a fine mesh material that can catch small particles. You can place these over the drains in your sump to catch debris as the water flows in.
Protein Skimmer: A protein skimmer can also help remove waste from the water. It works by creating tiny bubbles that attract waste particles. The waste then rises to the top of the skimmer and is collected in a cup for easy removal.
Refugium: A refugium is a separate section in your sump where you can grow plants or algae. These plants can help absorb excess nutrients in the water, which can reduce the amount of waste.