Why Is My Pond Water Brown?

Perry Mastrovito/Image Source/Getty Images

According to SFGate, pond water turns brown for a number of reasons, but the most common causes are eroding soil, microscopic plants and wildlife. High amounts of microscopic plants such as algae and phytoplankton give pond water an almost tea-like look. Soil erosion causes the banks of the pond to break away and fall into the water, giving it a brown look.

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