LEENKEA Biological Filter Sponge Blanket 120cm – Fish Tank

LEENKEA Aquarium Biological Filter Sponge Blanket – 120cm × 30cm × 0.5cm

Keep your fish tank water crystal clear with the LEENKEA Biological Filter Cotton Sponge Blanket. Designed for freshwater tanks, saltwater (seawater) tanks, and aquatic plant setups, this versatile filter media is engineered to support a healthy aquatic environment through superior mechanical and biological filtration.

Why Choose This Filter Sponge?

• Universal Compatibility: Suitable for freshwater tanks, seawater tanks, and aquatic plant aquariums. Easily trim to any shape or size to fit your filter system perfectly.
• Optimal Pore Density: Moderate, evenly distributed pores provide the ideal surface area for cultivating beneficial nitrifying bacteria, promoting a balanced and stable aquarium ecosystem.
• Biological & Mechanical Filtration: The biochemical cotton effectively breaks down organic waste such as fish excrement and leftover feed, improving overall water quality and clarity while helping reduce fish mortality rates.
• Blocks Large Debris: Can be freely positioned at the top or bottom of your filter stack to intercept large particles of waste before they enter finer filter media.
• Versatile Placement: Compatible with upper filters, canister/outer filters, sump systems, and more.
• Reusable & Long-Lasting: Simply rinse with clean water once a month (or as needed). The sponge will not clog permanently or deform — ready to use again and again.

Product Specifications

Package Contents

• 1× LEENKEA Aquarium Biological Filter Sponge Blanket (120cm × 30cm × 0.5cm)

Note: Actual color may vary slightly from images due to monitor brightness and display settings. Please allow for minor measurement tolerances of ±1–2mm.

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For more information on maintaining a healthy aquarium and aquatic environments, visit the U.S. EPA WaterSense Resource Center.

Frequently Asked Questions

Q: What size is the LEENKEA aquarium filter sponge blanket and can I cut it to fit my tank?

A: The filter sponge blanket measures 120cm × 30cm × 0.5cm, making it a large, flexible sheet that can be freely trimmed with scissors to fit virtually any aquarium filter — whether it's an upper filter, canister filter, or sump system.

Q: How often should I clean this biological filter sponge?

A: It is generally recommended to rinse the sponge with clean water approximately once a month, though you can adjust cleaning frequency based on your tank's bioload and water conditions. The sponge is designed not to permanently clog or deform, and it can be reused many times after rinsing.

Q: Is this filter cotton suitable for both freshwater and saltwater aquariums?

A: Yes! The LEENKEA filter sponge blanket is compatible with freshwater tanks, saltwater (seawater) tanks, and planted aquariums, making it a highly versatile choice for all aquarium hobbyists.

Q: How does the biological filter sponge improve water quality?

A: The sponge's moderate pore structure provides an expansive surface area for beneficial nitrifying bacteria to colonize. These bacteria help break down organic waste such as fish waste and uneaten food, converting harmful compounds and significantly improving water clarity and overall tank health.