Aquarium Filter Super Thick Biochemical Filter Cotton Sponge — Bio Cotton Foam Skimmer

High-density, super-thick biochemical filter cotton designed for clean, healthy aquarium water. Ideal for aquarium fish tanks, skimmers, sponge filters, canister pre-filters and power filters — this bio cotton foam delivers superior mechanical and biological filtration in one easy-to-use pad.

Key Benefits

• Superior debris removal — traps fine particles and suspended waste before it clogs your filter.
• Promotes beneficial bacteria — porous structure gives nitrifying bacteria a large surface area for biological filtration.
• Longer service life — super-thick design slows clogging, reducing maintenance frequency.
• Customizable & versatile — easy to cut to size for sponge filters, skimmers, canisters, hang-on-back and bio-media boxes.
• Reusable & washable — rinse in aquarium water to preserve beneficial bacteria and extend pad life.

Features

• High-density biochemical cotton sponge for combined mechanical + biological filtration
• Thick foam profile for increased dirt-holding capacity
• Soft, non-abrasive material safe for fish and invertebrates
• Compatible with freshwater and saltwater aquariums
• Easy to trim with scissors for a perfect fit

How to Use

1. Trim the foam to match your filter’s compartment or skimmer basket.
2. Rinse the pad in tank water (do not use chlorinated tap water) to remove dust.
3. Insert into your filter, sponges, or skimmer with pore side facing the incoming flow.
4. Clean by gently squeezing in aquarium water when flow slows; replace when worn.

Ideal For

• Community tanks, reef tanks, planted aquariums
• Sponge filters, internal filters, HOB/power filters, canister filter pre-filters, protein skimmers
• Hobbyists who want a low-maintenance, high-performance filter media

Care & Replacement

• Rinse in dechlorinated or aquarium water every 2–4 weeks depending on bioload.
• Replace every 6–12 months or when foam shows signs of breakdown or irrecoverable clogging.

Specifications (Typical)

• Material: High-density bio cotton foam
• Thickness: Super thick profile for extended use
• Cut-to-fit format — trim to desired dimensions

Keep your aquarium water clearer and healthier with this super-thick biochemical filter cotton sponge — add to cart for easier maintenance and stronger biological filtration.