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Digital pH Meter/Tester 0-14 Pocket Pen Free LR44 batteries
These digital pH pens are a cost effective way to read the pH of any water, for orchid culture ..
£13.99 £9.99
Digital TDS PEN Meter Tester Filter Water Quality
Digital TDS pens are ideal for testing the resulting strength of your feed, we don't need to get hun..
£13.99 £9.99
HTC-1 LCD High/Low Temperature Humidity
HTC-1 LCD Digital Temperature Humidity Meter Hygrometer Clock This is a simple but effective way ..

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