Lees Premium Under Gravel Filter for Aquariums, 15/20H gallon Dog Feeding and Watering Hanging Bowls The unit features 2-hour rapid

The unit features 2-hour rapid charge Lithium Polymer batteries

Size: Small size bones measure 3" and Large size bones measure 6"

Calcium iodate

allowing your pet to enjoy hours of warmth

Lees Premium Under Gravel Filter for Aquariums, 15/20H gallon Dog Feeding and Watering Hanging Bowls The unit features 2-hour rapidLees Premium Under Gravel Filters clean your freshwater or saltwater aquarium through a biological filtering process that supports the growth of beneficial bacteria. This allows natural detoxification and maintains proper ammonia balance by circulating water flow through the gravel bed. Under Gravel Filter Circulates Water Flow Through the Gravel Bed Requires the use of an Air Pump not included Maximize Water Quality by Using a Power Filter Provides