ISTA Round Bio-Sponge Filter, Rectangle, Black 4-1/2 X 5-5/8 Inch Kritter Keeper No sulfur or other offensive

No sulfur or other offensive odors

and a spring

Trace elements are not required in large quantities but are vital to the development and health of all living things

20-foot tie-out cable for large dogs

green tea leaf extract

ISTA Round Bio-Sponge Filter, Rectangle, Black 4-1/2 X 5-5/8 Inch Kritter Keeper No sulfur or other offensiveMechanical 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