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Amazon.com: VIVOSUN pH and TDS Meter Combo, 0.05ph High Accuracy Pen Type pH Meter ± 2% Readout Accuracy 3-in-1 TDS EC Temperature Meter for Hydroponics, Household Drinking, and Aquarium, UL Certified :
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HOME-FLEX Underground 3/4in IPS New Install Kit (1)3/4inx100ft Pipe, (2)3/4in Couplers, (2)3/4in Meter Risers, Gas Line Detection 18-429440-007 - The Home Depot
![Amazon.com: VIVOSUN pH and TDS Meter Combo, 0.05ph High Accuracy Pen Type pH Meter ± 2% Readout Accuracy 3-in-1 TDS EC Temperature Meter for Hydroponics, Household Drinking, and Aquarium, UL Certified : Amazon.com: VIVOSUN pH and TDS Meter Combo, 0.05ph High Accuracy Pen Type pH Meter ± 2% Readout Accuracy 3-in-1 TDS EC Temperature Meter for Hydroponics, Household Drinking, and Aquarium, UL Certified :](https://m.media-amazon.com/images/I/61saEhctTWL._AC_UF894,1000_QL80_.jpg)