Q: My fish hang out near my waterfall during hot days. Do I have enough aeration in my pond?
Amanda – Rowlett, TX
A: On hot days, who wouldn’t want to hang out near a waterfall! For humans, the water pouring into the pond cools and hydrates the air; for fish, that action acts as a giant aeration system, infusing oxygen into the water beneath the waterfall.
But that raises a valid question: If your fish spend a lot of time near the waterfall, does it mean they’re not getting enough oxygen? Yes, it’s possible. Here are some questions to ask yourself about your pond’s aeration situation.
Is It Getting Full Aeration?
If you’re running your waterfall 24 hours a day, your pond is likely getting full aeration. If your pond is more than 24 inches deep, however, and you have a skimmer/waterfall system in place, more aeration may be necessary. Why? Because the oxygenated water will circulate across the water surface, leaving the water at the bottom of the pond stagnant. Adding an aeration system will prevent stagnation by raising the bottom water to the surface.
Do You Have Many Plants?
Plants may release subsurface oxygen to the water during the day, but at night those plants take in oxygen, which means your fish may be gasping for air. If you have quite a few plants and your waterfall is off—and you experience an algae bloom—you should definitely think about adding some aeration.
Do You Have Many Fish?
The more fish in your pond, the more oxygen you’ll need—which means you’ll need more aeration. If your pond has a high fish population, consider adding some more aeration. For comparison, we recommend one 6- to 8-inch fish per 10 square feet of surface area.
How’s Your Muck Level?
Another clue that your pond is insufficiently aerated is the amount of muck that has accumulated at the bottom of your pond. When your pond is properly aerated, muck naturally breaks up thanks to the healthy and growing population of gunk-gobbling beneficial bacteria.
If any of these scenarios apply to your pond, we recommend adding the energy-efficient Airmax® PondAir™ Aeration System for ponds up to 2,000 gallons or the Airmax® KoiAir™ Aeration System for ponds up to 16,000 gallons. They help to circulate the water and add valuable oxygen, providing the best possible environment for your fish.
Pond Talk: What do you do to ensure your finned friends get enough oxygen during the summer months?