AQUATOP Classic Aqua Flow Internal Sponge Filter up to 40 Gallons

The AQUATOP Internal Sponge Filter ensures that your aquarium's water remains clean by encouraging the growth of cleaning bacteria. The bacteria remove ammonia and nitrite from the water to keep it healthy for your fish.

• Can be used in either a freshwater or saltwater aquarium
• For use with a powerhead or air pump
  
• Low maintenance, effective, long lasting, and durable
• Operates silently
• Dimensions: sponge diameter is 5 in; base diameter is 3 1/4 in