When the black foam in a hang-on filter turns grey with detritus, a fresh pad is the fix. This replacement sponge is cut for the Jingeye JY-W255, the 400L/h model in the hang-on range, and drops into the filter body of your aquarium or fish tank setup without trimming.

Good to know:
– Direct fit for the JY-W255 (400L/h) — match the model number on your filter before ordering
– Measures 30×15×65mm — the JY-W255 uses two sponge sizes, so compare with the pad you are replacing
– Black foam traps fine particles and gives beneficial bacteria somewhere to settle
– Rinse in old tank water, not tap water, before installing