What Does “Foaming” Water Indicate? 

“Foaming” on the water is an indicator for the presence of too many proteins, probably attributable to excess fish food and other organic waste. If you frequently see this “foaming” in large numbers around your pond, you might want to consider installing a pond skimmer (also called a protein skimmer) in your pond and/or reduce the amount of fish food given during “mealtime”.

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