$81.10
Determine turbidity or degree of visibility in natural waters with this weighted black/white secchi disk. Disk measures 20cm in diameter and comes with a braided line marked every half-meter for up to 20 meters. Disk also sold without the line.
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Determine turbidity or degree of visibility in natural waters with this weighted black/white secchi disk. Disk measures 20cm in diameter and comes with a braided line marked every half-meter for up to 20 meters. Disk also sold without the line.
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