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ALGEA CONTROL

Every pond at one-time or another will have a problem with algae. This green slime is unattractive and not good for the health of the water, plants, and/or fish. Unfortunately, for pond owners, algae is the unwanted beast that can become an overwhelming problem. When you first set your pond up, you need to choose a pump that will move one-half the total pond volume.Every pond at one-time or another will have a problem with algae. This green slime is unattractive and not good for the health of the water, plants, and/or fish. Unfortunately, for pond owners, algae is the unwanted beast that can become an overwhelming problem. When you first set your pond up, you need to choose a pump that will move one-half the total pond volume.

Filtering

In addition to proper water movement, the water will need to be filtered to control algae. That means the pump should be able to move the water through the filter, which again is the right size for the pond. If you use a biological filtration option, this will generally take weeks to months to mature. However, the result will be that your pond ends up with good growth, not bad growth. For the best filtration, the filter would need to run 7 days a week, 24 hours a day, 365 days a year.

Construction

Interestingly, the construction plays a major role in controlling algae growth. For this, you want your pond to have 40% of the surface area being the deep zone. This means the center should be a minimum of two feet deep for water and if you add Koi fish, three feet deep. Then about 30% of the pond should be an intermediate two feet deep with the rest of the pond being one to one and one-half feet deep. At the deepest level, you want to create a gentle slope, which will make the removal of debris much easier.

Runoff

The key to controlling algae is that you do not want runoff water to enter the pond. For instance, if it rains, then you do not want the water to land in the yard and then flow into the pond. In fact, this is probably the most common reason ponds have algae. In addition to the debris containing nutrients that feed the algae, making it grow, any chemical or fertilizer on the lawn would cause additional problems. If you have a pond already constructed, then you may need to rework it slightly to ensure you avoid runoff.

PH Level

Then, if you have a pond made from limestone, concrete, or marble, you would probably deal with a higher level of pH that can cause algae to grow. To help decompose sludge that builds up naturally, a number of products on the market can help. You should also clean your pond on a regular basis with a skimmer or pond vacuum. If all you have is a water pond without fish, certain plants will help to include those that grow under the water such as anacharis. These help remove the excess of nutrients that again cause algae to grow.

Special Plants

By adding water lilies or other types of floaters to include water hyacinth or water lettuce on about two-thirds of the pond’s surface, you will also help control the algae since these plants reduce sunlight penetrating the pond, thus keeping the water temperature cooler while starving the algae. If the algae problem continues, you can work with your local gardening center about the right type of product.

Summary

In summer, avoid overfeeding fish, use a biological filter, eliminate runoff, and make sure you use aquatic plants along with surface floaters. Then, you need to use biological treatments when needed. Finally, barley straw extract is an excellent option that work swell in larger ponds of 3,000 gallons or more.

Additional Information

Algae Control: Algae control article with images and tips from Aqua Mart.

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