Fish Tanks & Supplies

Hkfgdjdl Digital SM-1 In-Line Triple TDS Monitor, 0-9990ppm Range, +/- 2% Readout Accuracy,for Aquarium Online water quality detector: TDS value detection for tap water online, with built-in three-way interface. LCD display screen, clear numerical values for easy reading. Sensor interface: detachable sensor interface, easy to carry. Detachable High... Hkfgdjdl Digital SM-1 In-Line Triple TDS Monitor, 0-9990ppm Range, +/- 2% Readout Accuracy,for Aquarium