Visit Store£6.99Safe Home 12-in-1 Drinking Water Test Kit DIY Testing For Hardness, Copper, Nitrate, Fluoride, Iron, and More City Taps or Well Water 10-Strips Issueebay.co.uk
Visit StoreFrom £15.99VIVOSUN Digital PH and TDS Meter Kits, 0.01pH High Accuracy Pen Type PH Meter 2% Readout Accuracy 3-in-1 TDS EC Temperature Meter For Hydroponics, Poebay.co.uk
Visit StoreFrom £9.99Hardys PH Meter Tester Pen Digital Electronic Hydroponics Aquarium Water Test Kit UKdiy.com
Visit StoreFrom £39.99PH & Temperature 2-in-1 Continuous Monitor Meter W/Backlight Replaceable Electrodedhgate.com