LTWHOME 6 Inch Inch Coarse Pond Filter Foam Cube Block Pump Pre Filter Sponge(Pack of 3)has an off centre hole cut out (3. 5" Diameter x 4. 5" deep) Coarse grade foam,Cuts Easy To Any Required Shape Package Include: 3PCS 6" Inch Coarse Pond Filter Foam Good for freshwater & marine environments Traps Particles & Debris Enhances biological filtration

We recommend that filter foams should be rinsed every 3 weeks and replaced every 2 months

Foam size:90mm x 70mm x 16mm

Custom designed and manufactured for AquaOne Aqua One AQUIS 700/750 and 500/550 filtration systems

Change these sponge foams regularly to keep optimal filter performance

Remove large particles keeping your aquarium clean and clear

Pack include: 12 pcs

Pack include: 4 x Coarse Filter Foam

12 x polyester pads

100 PCS Poly & 100 PCS Carbon

Pack include: Carbon Pad x 8

should be replaced regularly

600/Ultra G Pro 3 filter 2071