Dissolved Oxygen Meter, Digital DO Tester with ATC and Salt Compensation, Pond Dissolved Oxygen Tester with 9.84ft DO Probe Cable, Dissolved Oxygen Test Kit for Aquarium, Ponds, Fish Tank sold2025 ensuring reliability and stable performance

ensuring reliability and stable performance during long-term use

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54mm Hole diameter:1

And the drain hole design fits a variety of preparation and cleanup tasks to keep water go through the drain smoothly

50small circular

Dissolved Oxygen Meter, Digital DO Tester with ATC and Salt Compensation, Pond Dissolved Oxygen Tester with 9.84ft DO Probe Cable, Dissolved Oxygen Test Kit for Aquarium, Ponds, Fish Tank sold2025 ensuring reliability and stable performanceDissolved Oxygen Meter, Digital DO Tester with ATC and Salt Compensation, Pond Dissolved Oxygen Tester with 9. 84ft DO Probe Cable, Dissolved Oxygen Test Kit for Aquarium, Ponds, Fish Tank Product Features [Portable DO Meter with mg L and % Modes]: The dissolved oxygen test kit with two modes: mg L mode (dissolved oxygen content in water, 1mg L=1ppm) and % mode (saturation percentage). Easily obtain accurate oxygen content in the solution.