Pre Filter Sponge

Regular price
Sale price
Regular price
Sold out
Unit price

Maximum quantity in stock reached.

  • Increases Filter Capacity
  • Prevents Small Fish and Debris from Getting Sucked Up
  • Uses Coarse Foam to Extend Time Between Cleaning

The pre-filter or intake sponge is a simple foam cylinder that is designed to slip over the intake tube of hang-on-back (HOB) and canister filters. The filter intake tube often has large openings that allow sizable objects to get sucked up by the filter, potentially ruining the motor, so use a pre-filter sponge to help prevent baby fish, dwarf shrimp, little snails, plant leaves, fish food, and other debris from entering the filter. (depending on filters suction, and size of animal, tiny fry/shrimp/snails can still get through in some cases)

An intake sponge also provides valuable surface area to grow beneficial bacteria, which purify waste chemicals in the water and make it safe for your fish to live in. Finally, it adds mechanical filtration that extends the life and efficiency of your filter media.

Find out which sponge size to get and how to properly fit it to your hang-on-back or canister filter intake by  viewing the sizing chart and video below. (Click the "Show More" button to expand the Directions/Specifications section.)

Customer Reviews

Based on 2565 reviews
Ron P. (Riverside, CA, US)
Fluval 4 filter

These sponges work so well because of the porous material the sponges are made of. No problem with small shrimp or fish. Extends out the time of cleaning the canister filter.

Marcel M. (Pittsburgh, PA, US)
Pre-filter Sponger

Great item. Does a great job at catching the bigger stuff while keeping it out your filter. Highly recommend!

Shante M. (Birmingham, AL, US)
Awesome stuff!

Keeps my guppy fry from getting sucked up into the filter, works great.

Randy S. (East Liverpool, OH, US)
I love these filters

They are a big help in keeping the junk out of the canister filters and keep the fry from getting sucked in.

Steve B. (Evansville, IN, US)
Works great!

Works great! The coarse is much better than other filters I've used