
Vial must contain exactly 0.05mL per 3 drops of solution or it will show as either super alkaline or acidic. Bought because 8oz general hydroponics would last longer and ended up regretting buying this product. The next day I placed my order for the General Hydroponics brand.

π― Honey Refractometer with Automatic Temperature Compensation (ATC) - Tiaoyeer Moisture, Brix, and Baume Refractometer for Honey, 58-90% Brix Scale Range - Honey Moisture Tester
31 Review

80 Pieces Water Test Litmus Strips Litmus ph Paper Soil Acidity Meter Liquid pH Tester 1-14
10 Review

Portable digital multimeter with sound continuity and thermocouple (electric tester) LTX DT-838
7 Review

π PH 1-14 Extensive Storage Testing Monitoring: Optimize Your Storage with Precise pH Level Monitoring
6 Review

Portable Handheld Manometer π for Accurate Pressure Differential Measurement
5 Review

π Enhanced Precision with Backlit Professional Manometer for Differential Ventilation
6 Review

π¬οΈ Advanced 3-in-1 Indoor Air Quality Monitor with CO2/RH/Temp Data Logging and Audible Alarm - NDIR Sensor Technology
8 Review

π‘οΈ Continuous Temperature Monitoring with Relative Humidity Integration
4 Review