Over the last couple of months at work I have seen an ongoing trend: requests to reduce the amount of time pond fountains are running in an effort to lower electricity costs and save money. While economically this makes a lot of sense, ecologically it may be setting your pond up for future problems. During the summer months, ensuring that your pond has proper aeration is critical to effective pond management. Increases in seasonal temperatures cause stratification of the pond. Stratification is the layering of water in a pond due to temperature differences. Imagine warm shallow water floating on top of colder deeper water. This causes multiple problems. First, the upper warmer layer of water does not hold oxygen very well creating a habitat unsuitable for aquatic life. Secondly, during periods of prolonged stratification, the deeper water’s oxygen is consumed by the organisms living there. The upper layer acts as a cap not allowing oxygen to be replaced. Over time, oxygen levels can become dangerously low and could eventually lead to suffocation of the species living in the waters and a fish kill.
It is these
associated problems that make it so important to leave your pond fountain or aerator
running during the summer months. Both systems provide a dual benefit providing
both oxygen to the water and breaking those stratified layers. Constant
movement of the water by the fountain or aerator keeps the water temperature
more uniform not allowing those stratified layers to form. Warmer temperatures
result in water loosing its ability to hold oxygen. Increased oxygenation
through increased aeration is critical to maintaining healthy levels of oxygen
in your pond. It is for these reasons that we do not recommend decreasing the
amount of time you run your fountain or aerator.
Ideally, your
fountain should run constantly to ensure that it is offering the maximum
benefit to your pond. However, if you
are truly concerned about the amount of time your fountain is running, there
are a few more effective ways of cutting energy without negatively affecting
your pond. Simply turning off the fountain lights or reducing
the amount of time they are on can lower energy costs without impacting the
pond’s health. Lights offer an aesthetically pleasing aspect to your fountain but offer no benefit to the pond from an ecological standpoint. Setting your fountain’s timer to power off intermittently during
the day can also help with energy costs. We advise that these “off” periods
last no longer than ten minutes per hour. Spacing out your shut off times for the fountain can lower run time
without having as drastic of an effecting on the pond. Most fountain owners are
tempted to turn their fountain off at night; however, turning your fountain off
for consistently long periods of time each day may be just enough for
stratification to occur causing further pond damage.
These are
just a few money saving tips that we can offer to help you save some money
without sacrificing the health and quality of your pond. Always contact your pond professional if you have any questions about the on-going care of your pond aeration system.
SOLitude Lake Management, servicing VA, NC, SC, MD, DE, PA, WV, NJ
& NY, is a full service lake, pond and fisheries management company offering
a full array of aquatic services and products. www.solitudelakemanagement.com
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