SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/fish-mechanical-filtration

What does mechanical filtration do?

It traps solid particles like uneaten food and debris.

Start playing free

  1. It kills viruses
  2. It traps solid particles ✔
  3. It raises pH

Why: Filter pads or sponges strain particles from the water. This keeps water clear and slows waste breakdown.

Huh, didn't know that: Merck says replaceable filter cartridges should be changed about once a month, or sooner if clogged.

The dad joke
Why did the fish love its filter? It always caught the drift.
Like this card?
Play the game

References

Answer: It traps solid particles. Filter pads or sponges strain particles from the water. This keeps water clear and slows waste breakdown.

  1. Merck Veterinary Manual (pet owner): Providing a Home for Fish www.merckvetmanual.com/all-other-pets/fish/providing-a-home-for-fish
    a replaceable filter cartridge that consists of filter floss, which collects particulate matter
    Checked 2026-10-11.
  2. Merck Veterinary Manual (pet owner): Routine Health Care of Fish www.merckvetmanual.com/all-other-pets/fish/routine-health-care-of-fish
    Replaceable cartridges should be changed once a month, or more often if the filter floss
    Checked 2026-10-11.

Think this answer is wrong? Tap "Challenge this answer" on the card in the game and tell us why.

Test yourself in the game

Fish & AquariumsHow long can a well-cared-for goldfish live?Fish & AquariumsHow large can a goldfish grow?Fish & AquariumsDoes a small tank set a healthy maximum size for a goldfish?

That's stuff everyone should know.