Biochemical Sponge Filter for Fish Tank – Air-Driven Bio Filter

Cloudy Water Is Stressing Your Fish More Than You Think

Ammonia and waste build-up in an unfiltered or poorly filtered aquarium is one of the leading causes of fish stress, disease, and death. If your water isn't crystal clear, your fish aren't thriving — they're just surviving.

Most basic filters push water through mechanical media only, leaving behind the invisible biological waste that slowly poisons your tank. You clean it, it gets dirty again within days, and the cycle never ends.

This biochemical sponge filter works with your air pump to deliver both mechanical and biological filtration simultaneously — trapping debris while cultivating beneficial bacteria colonies that naturally break down ammonia and nitrites, keeping your water stable and your fish healthy.

Why This Sponge Filter Works

• Dual Biological + Mechanical Filtration: The high-density sponge traps physical waste while its porous structure hosts beneficial bacteria that convert harmful ammonia into safe compounds — a complete mini-ecosystem in one unit.
• Adjustable Height (16–23 cm): The telescoping tube adjusts to fit different tank depths, making it versatile across a range of aquarium sizes.
• Gentle Water Flow — Safe for Fry & Shrimp: Air-driven suction is soft enough not to harm baby fish, shrimp, or delicate species that can't handle strong currents.
• Easy to Clean Without Losing Bacteria: Simply squeeze the sponge in old tank water during water changes — the beneficial bacteria stay alive while debris is removed.
• Suction Cup Mounting: The 3.5 cm suction cup base attaches firmly to the tank wall, keeping the filter stable and positioned exactly where you need it.
• Plastic + Sponge Construction: Durable, non-toxic materials safe for all freshwater fish, shrimp, and invertebrates.

The Experience of a Truly Clean Tank

Imagine looking at your aquarium and seeing perfectly clear water — every detail of your fish, plants, and substrate visible without a hint of cloudiness. The gentle bubbling sound of the air-driven filter creates a calming ambiance while you know, beneath the surface, beneficial bacteria are silently working to keep your water chemistry balanced. No more emergency water changes, no more stressed fish gasping at the surface.

Ideal For

• Small to medium freshwater aquariums
• Breeding tanks and fry nurseries
• Shrimp tanks and invertebrate setups
• Quarantine and hospital tanks
• Betta fish tanks (gentle flow)
• Desktop and office aquariums

How to Set It Up

1. Assemble the filter tube and attach the sponge to the base.
2. Adjust the tube height (16–23 cm) to suit your tank depth.
3. Press the suction cup firmly against the inside wall of your aquarium.
4. Connect the air tube from your air pump to the top of the filter.
5. Turn on the air pump — bubbles will draw water through the sponge, starting filtration immediately.
6. Rinse the sponge in old tank water (not tap water) every 2–4 weeks to maintain flow and bacteria colonies.

Specifications & Available Options

• Material: Non-toxic plastic + high-density sponge
• Filter Tube Length: ~10.5 cm
• Total Height: 16–23 cm (adjustable)
• Sponge Dimensions: ~8 cm length × ~5 cm diameter
• Suction Cup Diameter: ~3.5 cm
• Package Includes: 1 × Filter unit

Choose Your Option

• Replacement Cotton (Sponge Only): Perfect if you already have the filter body and just need a fresh sponge media replacement.
• Filter (Complete Unit): The full assembled filter including tube, sponge, and suction cup — everything you need to get started right away.

Give your fish the clean, stable water they deserve — healthy water means healthy fish. 🐟