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PVC fitting
Dual scale
even when the foam is completely saturated
These aerators have changed little in the last 30 years
Hand Counter Booster Pump PVC fittingEasily fits in your hand to be thumb operated. The register advances by one digit, up to 9,999, each time the button is pressed. A turn of the side knob resets the register back to zero. Its a great tool for counting algae cells, zooplankton, fry, people, etc.
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