Whisper 40i Internal Filter c4 foam pad This economical but sturdy pump

This economical but sturdy pump adds air bubbles

Lowers pH and absorbs harmful chemicals and heavy metals

Features 6 outlet plastic valve

Replaces the original intake & outake tubes that go over the rim of your tank for Cascade 700

Whisper 40i Internal Filter c4 foam pad This economical but sturdy pumpThe Tetra Whisper internal aquarium filter is the ultimate in quiet, convenient 3 stage filtration. The dual sided mesh of the Bio Bag catches debris and fish waste while the activated carbon absorbs odors and discoloration. Biological filtration is provided by the Bio Scrubber. Bio Scrubber's anti clog design provides complete biological filtration with the convenience of less maintenance. Because the Bio Scrubber has a solid back, water is forced to