This Cascade 300 Bio-Sponge has been specially developed for the Cascade 300 Power Filters. Optimizes colonization of beneficial aerobic bacteria and removes ammonia and nitrates keeping the aquarium healthy. Convenient, no-fuss, replacement sponge slides into your existing frame. Shipping weight: 1/5 lb.
I'd recommend doing business w/ Petguys they had these filters & they sent them to me super fast. I've bookmarked you. Have a great week.
December 29, 2015
The bio sponges fit in my fish tank
Creal Springs, IL
October 25, 2012
Love it !!! Pet Guys make it easy and fast to get what I need. When I go to my local pet shot they may or may not have what I need in stock. But Pet Guys always have what I need, and it only takes a few days to have it delivered to my front door. Thanks Pet Guys