25/10/2026
What's actually inside the canister filter under your tank? π I've pulled one apart in a 2-minute animated blueprint.
You'll see how water runs down to it, why the media goes coarse sponge first, ceramic next and fine floss last, and how the sealed motor spins a magnetic impeller through a plastic wall. There's also what weak flow, rattling and gurgling usually mean, and how to clean it without killing the bacteria.
Every part is also on a free A3 blueprint poster you can download and print: https://www.artsfishroom.co.za/pages/free-posters
How often do you service yours? Tell me in the comments π