Aquarium Sponge Filter

A simple sponge filter with a gentle flow that's easy on fry, shrimp and small fish.

When the filter is too strong

Many power filters pull hard at the intake. Baby fish, shrimp and slow swimmers can get pushed around or drawn in, and the strong current leaves them little calm water.

Gentle, steady filtration

Water is drawn slowly through a large sponge, which traps debris and gives helpful bacteria a place to grow. The result is mechanical and biological filtration with a soft flow. When it gets dirty, rinse the sponge in old tank water and put it back.

What Makes It Different

• Two kinds of filtration: mechanical and biological in one sponge
• Gentle flow: a good fit for fry, shrimp and small fish
• Durable ABS body: made for long-term use in the tank
• Easy care: pull it out, rinse the sponge, drop it back in
• Freshwater or saltwater: works in either

What Pet Parents Notice

• A quiet, low-fuss filter for breeding and shrimp tanks
• Small fish that aren't fighting a current
• Cleaning that takes a minute, not an afternoon

What You Get

• 1× Aquarium sponge filter (gray)

Specs

• Filtration: mechanical and biological
• Body: ABS plastic
• Water type: freshwater and saltwater
• Runs on: an aquarium air pump with airline tubing
• Color: gray

FAQ

Does it need an air pump?
Yes. Like most sponge filters, it runs on an aquarium air pump connected with airline tubing.

Is it safe for shrimp and baby fish?
The sponge covers the intake and the flow is gentle, which is why sponge filters are a common pick for fry and shrimp tanks.

How do I clean it?
Squeeze and rinse the sponge in a bucket of old tank water. Skip tap water and soap so the helpful bacteria stay in the sponge.

Our Happy Trails Promise

If the sponge filter isn't the right fit for your tank, you have 30 days after your order arrives to request a return. Email customersupport@happytrailspetshop.com first and we'll send you the return steps. If anything arrives damaged or defective, send us a photo right away so we can resolve it. Return shipping and any restocking fee for change-of-mind returns are explained in our Refund Policy.