8 in 1 WiFi pH Meter Multi-Parameter Water Monitor pH, Temperature, TDS, EC, Salinity, Specific Gravity, ORP For Aquariums

4-in-1 Plant Soil Tester Kit with pH Light Moisture Acidity Meter for Flowers - Comprehensive Garden Care Tool

£13.61

PH Buffer Powder Calibration Set PH4.01 PH6.86 PH9.18 ORP 256MV KCL Solution Powder For PH Meter Tester Aquarium Hydroponics

£5.28

5 in 1 PH Test Strips Multipurpose SPA Swimming Pool Water Tester Paper Hardness Tool Bottled 50pcs

£7.23

50/100PCS Water Quality Test Strip Multipurpose 7 in 1 Aquarium Test Strips Water pH Test Tools for Fish Tank Swimming Pool

£8.72

NT Labs Aquarium Narrow pH Test

£6.99

IBS Scherer pH value < 9.5, pH value < 9.5, spray bottle, pack of 6 x 0.5 l

£93.60