ISTA Round Bio-Sponge Filter, Rectangle, Black Size:6 in STRONG with a two-millimeter wall

STRONG with a two-millimeter wall thickness

Tug-a-Mals come shaped like one of seven different animals—including a frog

This algae eater food provides essential nutrients

It's also ideal for dogs that have a habit of chewing through traditional leashes

ISTA Round Bio-Sponge Filter, Rectangle, Black Size:6 in STRONG with a two-millimeter wallMechanical filtration: Provides excellent filtering effect while oxygenating the water Biological Filtration: Foam material supports the colonization of bacteria Can be used with either an air pump or any external filter Silent operation by reducing air pump noise Easy to install and simple to maintain