Photo 1 of YINMIK Aquarium pH Salinity Monitor, Smart pH Salt Meter, Digital pH PPM Salt Tester for Saltwater Aquarium Reef Tank, WiFi 5 in 1 pH Salt TDS Humidity Temp Monitor for Freshwater Fish Tank, Koi Pond

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Photo 1 of YINMIK Aquarium pH Salinity Monitor, Smart pH Salt Meter, Digital pH PPM Salt Tester for Saltwater Aquarium Reef Tank, WiFi 5 in 1 pH Salt TDS Humidity Temp Monitor for Freshwater Fish Tank, Koi PondPhoto 2 of YINMIK Aquarium pH Salinity Monitor, Smart pH Salt Meter, Digital pH PPM Salt Tester for Saltwater Aquarium Reef Tank, WiFi 5 in 1 pH Salt TDS Humidity Temp Monitor for Freshwater Fish Tank, Koi Pond