Qzbhct 3 Size 12 Pack Pre Filter Sponge Aquarium Intake High-Porosity Foam Roll Fish Tank Shrimp Beta Baby Fish Replacement Foam Cover Filtration Freshwater Saltwater 5-20 Gallons

Approx Small Foam Size: 2.8 x 1.57 inch(H x W), Inner hole diameter: 0.39 inch<br> Approx Medium Foam Size: 3.54 x 1.97 inch(H x W), Inner hole diameter: 0.87 inch, please check your filter to purchase the size you need<br> Approx Size: 5.9 x 2.6 inch(H x W), Inner hole diameter: 0.8 inch, please check your filter to purchase the size you need<br> Performs mechanical filtration by trapping particles and debris as they pass through the insert<br> Enhances biological filtration, provides efficient water flow with less clogging for long lasting filtration, custom fit to prevent bypass<br> Good for freshwater and saltwater environments<br> Package included: 4 Pack Qzbhct new small foam filter media pads, 4 Pack Qzbhct new medium foam filter media pads, 4 Pack Qzbhct new big foam filter media pads

• Approx Small Foam Size: 2.8 x 1.57 inch(H x W), Inner hole diameter: 0.39 inch; Approx Medium Foam Size: 3.54 x 1.97 inch(H x W), Inner hole diameter: 0.87 inch;Approx Size: 5.9 x 2.6 inch(H x W), Inner hole diameter: 0.8 inch, please check your filter to purchase the size you need
  
• Performs mechanical filtration by trapping particles and debris as they pass through the insert
• Good for freshwater and saltwater environments
• This pre filter sponge foam only have a single hole