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Pond Dredging: Is It Worth It?

Over time, ponds often begin to fill as dead algae, leaves, and other organic material settle at the bottom. In a healthy pond ecosystem, aerobic (oxygen breathing) bacteria will break down all of this organic material quickly and efficiently.

However, if a pond does not have adequate amounts of these decomposing bacteria to break down all the organic material, the pond will begin to fill, and its depth decrease. This will cause the pond bottom to become covered by a nutrient-rich muck-like substance.

If this is allowed to continue for long enough the pond will ultimately begin to resemble a wetland or marsh. Once this occurs, many people hire contractors to dredge their pond.

Before any pond can be dredged, regardless of whether it is private or not, the pond has to receive certain permits (how many permits depends on location and extent of the dredging). Permits are necessary because under the Federal Clean Water Act and Amendments, the Corps of Engineers is required to regulate pond dredging in accordance with certain environmental criteria. (more…)


Koi Pond and Waterfall: Top 21 Most Asked Questions Answered

Koi Pond, Mt Faber Park, Singapore

Image by Amy Dianna via Flickr

Q What is the ideal depth for a koi pond?

A In my experience of over 25 years, 4 to 5 feet is ideal. You need a minimum of 3 feet for koi fish for several reasons. Safety for fish from wading cranes they can not wade in 3 feet of water.

Plus the water temperature in shallow ponds fluctuates too much with the changes in ambient temperature. The greater the volume of water, the longer it takes for the temperature to change. Warm water or fluctuating temperatures are unhealthy for fish.

Q What is the ideal size for a pond?

A The ideal size would be determined by the size of your yard. Its size should be proportional to the size of the yard. Also, the larger the pond, the greater the maintenance. (more…)


Ponds & Waterfalls: Layout & Excavation

backyard pond

Image by massdistraction via Flickr

Author: Doug Hoover

First of all: know what you want. If you need some ideas, visit the library or your local book store and browse through landscape books, garden and pond magazines. You can also search the web and read and study as much as possible.

Layout is the most important phase of the entire project. I have heard many complaints from disappointed clients after they had a chance to get used to their new addition to the landscape. “I only wish we had made it bigger … made it deeper … added an island … made it longer and constructed a bridge … built it closer to the house … installed a larger water pump for the waterfall … or … built the waterfall higher or wider.”

Most of these wishes could have been granted for a reasonable cost before or during construction. But waiting until afterward means incurring a major expense that may be cost prohibitive. If your choice is to omit the item or feature because of its cost, then make structural preparations to allow for adding it on later. You can plan and design the landscape to allow for easy additions to the koi pond later just by the strategic placement of trees, sprinklers, drain lines, and much more. (more…)