Cylindrical Filter Sponge
The Cylindrical Filter Sponge is great for placing over the intake of a power filter or overflow so the fry are not sucked in and as a pre-filter to improve the biological filtration. Also good for the outlet of hang-on protein skimmers to reduce bubbles in the aquarium. If the hole is too large then use a cable tie or elastic band to secure it to the pipe.
Size (mm): 90 long x 50 diameter.
Hole Size (mm): 24 diameter x 75 deep (does not go all the way through).