Sponge Filters
Slate base 15ppi Sponge filter
Internal-weight sponge filter
Internal-weight 30ppi sponge filter
30ppi Mag Sponge Filter
30ppi Slate Bottom Sponge Filter
50ppi Slate Bottom Sponge Filter
15ppi Mag Cube Filter
PPI Comparison

Filter - Cube Sponge Filter

Regular price $5.45
Shipping calculated at checkout.

Made from our Pro-Level Reticulated Foam, specifically suited for colonizing nitrifying bacteria at the highest levels in aquariums.

The current lift-tube color is a dark green.  The Slate bottom filters have a round slate attached to the bottom. 

As you can see from the list below, a 4.25" cube contains a lot more foam than a 4" one - over 20% more!

  • 3" cube filter has a volume of 27 cubic inches
  • 3.25" cube filter has a volume of 34 cubic inches
  • 4" cube filter has a volume of 64 cubic inches
  • 4.25" cube filter has a volume of 77 cubic inches
  • 5" cube filter has a volume of 125 cubic inches

Sponge Filter Details:  Please read here

Life is too short to live without the Filter - Cube Sponge Filter. Be happy. Be Content. Be Satisfied.

Inventory Last Updated: Sep 29, 2023

Customer Reviews

Based on 10 reviews
Michael Martin
Works great

Skipped the airpump and pushed the sponges into the water intake of small, hang on the back power filters. Total quiet.

Carolyn Butler

We love these filters! Have about 150 working in 25 tanks!
This is all we use…..squeeze a couple of times and good to go again!

Eric Fuhrman
Great Product

Love these sponge filters.


It is the second time that I buy sponge filters, I am very happy and I would buy again

Netanel Herscovitch
Simple but works great. Does excellent job.

Very pleased with this sponge filter. Easy to set up. Super Duper easy to clean. Give it few squeezes place it back and it sinks to the bottom on its own. Thank you .