Cascade Bio-Sponge for Internal Filters

by Cascade

Selected Option: Cascade 300 (1 Pack)
$24.99 (You Save 45%)
Free Shipping Over $75
Only 1 Left In Stock!
Selected Option: Cascade 300 (1 Pack)

Key Features

  • Quick and easy to replace
  • Convenient, no-fuss replacement sponge
  • Replace monthly for optimum water quality
  • Convenient, no-fuss replacement cartridges for your Cascade 300, 400 & 600 internal power filter.
  • Optimizes the colonization of beneficial aerobic bacteria.
  • Easy-to-replace disposable filters.


Cascade Bio-Sponge for Internal Filters Cascade 300 (1 Pack)

The Replacement Bio-Sponge for the Penn Plax Cascade Internal Filter optimizes colonization of beneficial aerobic bacteria and removes ammonia and nitrites.

Specifications: Fits Penn-Plax Cascade 300 Internal Filter


Brand Cascade
UPC 030172017599
Item Number L1616190910P16161
Size Cascade 300 (1 Pack)
Weight 0.84 lbs.
Pkg Dimensions 2.75" (L) x 2.75" (W) x 3" (H)

Customer Reviews

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Reviewed by Barbara H. on Jul 2, 2021

Just right

Reviewed by Jennifer R. on Jun 27, 2021

PENN-Plax Cascade 600 Submersible Aquarium filter.

Reviewed by Vicki K. on May 7, 2021

The actual product is much smaller than the specifications shown here

Reviewed by Sydni M. on Apr 26, 2021

A must have addition to your tank care

Reviewed by Art L. on Apr 2, 2021

Four Stars

Reviewed by Leslie M. on Feb 26, 2021

Cascade filter sponge

Reviewed by Stan W. on Jan 27, 2021

Five Stars

Reviewed by Aaron A. on Jan 6, 2021


Reviewed by Juan R. on Jan 1, 2021

Reviewed by Linda V. on Dec 28, 2020

Very useful in my 5-gallon tank.

Reviewed by Gillian Durrant on Nov 29, 2020

the only filter that works for me...and my turtles

Reviewed by Preston C. on Oct 28, 2020

easy installation works great

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