BAP-4 small pond air pumpBAP-4 Small Pond Air Pump
Aeration for 500 Gallon Ponds and Water Tanks

Low cost series. The BAP-4 small pond air pump is energy efficient at just 4 watts. The BAP-4 small pond air pump costs just $0.23 per month to operate.

  • .014 cfm / 242 in³
  • Infuses oxygen into water
  • Increases circulation
  • Increases fish health
  • Increases bio filtration efficiency
  • Integrated rubber feet reduce vibration
  • Keeps holes open in ice
  • Increases hydroponic growth rate
  • 1 year warranty

BAP-4 small pond air pump produces .014 cfm (242 in³) of oxygen to ponds, fish holding tanks, and hydroponic systems. Oxygenated water is critical for keeping fish and aquatic life alive and healthy. Aerating the water also benefits the bacteria living inside biological filters. 

The fish holding tanks shown here feature one BAP-4 small pond air pump pushing air through two 2″ ball diffusers. The BAP-4 can also be used to aerate fish hospital tanks and holding tanks during pond clean-outs.

BAP-4 small pond air pump is not rated for outdoor use. If using the BAP-4 outdoors, it must be protected from the weather. The BAP-4 small pond air pump is not weather resistant or submersible.

The BAP-4 small pond air pump can be used with two 2″ ball diffusers, or two 3″ round diffusers. The maximum depth for a diffuser with the BAP-4 is 24″.

High Efficiency BAP-4 Small Pond Air Pump

BAP-2 small pond air pump for aerating fish holding tanksRunning on just 4 watts of electricity, this whisper-quiet aeration pump costs virtually nothing to run. You can feel good about providing constant aeration to your pond, fish tank, or hydroponic system.

Aeration is extremely important. A healthy ecosystem requires a constant supply of oxygen. The BAP-4 small pond air pump provides .14 cubic feet of oxygen per minute to the water. This increases and maintains higher levels of dissolved oxygen in the water. Also, the rising air bubbles increase water circulation.

During warmer months, warmer pond water contains less dissolved oxygen than colder water. Adding a BAP-4 small pond air pump with a diffuser ball will help keep fish and ecosystem healthy. Higher levels of oxygen dissolved in your pond increases the metabolism rate of the beneficial bacteria living in your biological pond filter.

BAP-2 small pond air pump will keep a whole open in the ice during winter freazes


During periods of freezing weather
– the rising air bubbles from a BAP-4 small pond air pump with diffuser will keep a hole open in the ice. The churning bubbles prevent the pond from completely freezing over. Keeping a hole open in the pond is critical for the health of your fish. An open hole in the ice allows for potentially harmful gasses to escape the water.






BAP-1 small pond air pumps is great for hydroponic systems


The Benefits of a BAP-4 Small Pond Air Pump and Hydroponics

Hydroponics is proved to have several advantages over soil gardening. The growth rate on a hydroponic plant is 30-50 percent faster than a soil plant, grown under the same conditions. The yield of the plant is also greater. Scientists believe that there are several reasons for the drastic differences between hydroponic and soil plants. The extra oxygen supplied by the BAP-4 small pond air pump in the hydroponic growing mediums helps to stimulate root growth. Plants with ample oxygen in the root system also absorb nutrients faster.

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