Penn Plax Filt-a-Carb Universal Carbon Under Gravel Filter Cartridge, 36 count (18 x 2 ct) Dog Grooming Oil Spray Eliminates solid waste with natural

Eliminates solid waste with natural bacteria and enzymes

or wooded area

Dramatically stimulates the growth of roots and shoots in aquatic plants

iron and zinc

nutrient-dense ingredients that provide the right balance of protein

Penn Plax Filt-a-Carb Universal Carbon Under Gravel Filter Cartridge, 36 count (18 x 2 ct) Dog Grooming Oil Spray Eliminates solid waste with naturalPenn Plax Filt a Carb Universal Carbon Undergravel Filter Cartridge helps keep your aquarium water clean. Fits most undergravel filters. Contains quality activated carbon that removes harmful gases and odors and clears up discolorations. Quick easy and disposable. Helps keep tank water healthy Trouble free maintenance Ready to use Clears up unsightly discoloration Instructions: Rinse thoroughly before placing in filter. For best results, replace every