The general stagnant-water ruling does not make visible clarity alone sufficient after impurity has fallen into the water.
The exception is a sufficiently extensive pond where impurity occurs at one end and its reaching the distant end is not apparent. This exception rests on a recognised measure of the pond’s extent, not simply its name.
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Impurity in Stagnant and Running Water, Large Ponds, and Aquatic Creatures
The general stagnant-water ruling does not make visible clarity alone sufficient after impurity has fallen into the water.
The exception is a sufficiently extensive pond where impurity occurs at one end and its reaching the distant end is not apparent. This exception rests on a recognised measure of the pond’s extent, not simply its name.