Digital PH Meter, 5 in 1 PH/EC/TDS/Salt/Temperature Meter, High Precision Digital Multifunctional Water Test Kits for Water, Fish Tank, Pools & Hydroponics

HJB VISSO Digital PH Meter, 5 in 1 PH/EC/TDS/Salinity/Temp Meter for Water, High Accuracy Digital Multi-Function Water Testing Kits for Water, Fish Tank, Pools and Hydroponics

MRTURK REVHQ Litmus PH Test Strips 320 Strips, Professional Universal pH.1-14 Test Paper, for Teaching, Student, Chemistry Experiment, Saliva Urine Water Soil & Diet pH Monitoring

Katyayani pH UP- pH Balancer, for Raising Nutrient Solution pH, Used for Hydroponics (900ml x 1)