After sending new photos to the state pond expert we received the following reply: “The brown water color could be from organic matter breaking down – leaves, etc.; fish stirring up sediment and soil; or clay particles washing in from nearby soils. What type of fish are in the pond? Do you see any fish: Koi and some catfish species can stir sediments and cause a brown color. ”
The driveway is a possible reason for suspended particles.
“From the photos, it appears there is a driveway nearby, and this could be a source of clay particles.
After 24-ours the pond water was light greenish but clear.
To test this, you can fill a clear jar with the pond water and see what settles after 24 hours. If the color still remains in suspension, then you can add a little of either gypsum (calcium sulfate), Epson salts (magnesium sulfate), aluminum sulfate (alum), or limestone (calcium carbonate) to see if the color settles. Epsom salt or garden limestone may be easier to find, but you only need a very small amount – 1/8 teaspoon in a quart jar. If the color settles, then it confirms suspended clay particles, and you can treat the entire pond.”
After adding about a teaspoon of Epsom salts the waster remained the same.
According to our expert at the University of Maryland Extension Agency “the water settling test showed that it is not clay turbidity, rather, other dissolved organics and some phytoplankton. A brownish color that does not settle can also be an indication of tannins from decaying plant matter. Tannins are not harmful to aquatic life, but can reduce the pH of the water. (Do you have pH strips that you can measure the pH?) Take a measurement in the morning and later afternoon and let me know the results.”
The orangish plants are bulrushes.
I also sent a photo of the plants growing around the edges of the pond which are now flowering. Our expert confirmed “the plant in the photos is called rufous bulrush (Scirpus pendulus) and is a good waterfowl and the roots provide habitat for a variety of aquatic organisms. The plant is also taking up nutrients, which is desirable.”
We’ll wait until fall to remove some of the overgrowth.
I asked if we could plant iris versicolor around the pond which was confirmed as a good choice. I have one to transplant from my garden at The Glade where it is NOT thriving.
There’s a lot to know about managing a pond.
The next step is to take the pH of the pond water as suggested by my expert and send him the results.
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