pH Probe KCl Storage Solution
C$19.95
Bluelab - pH Probe KCl Storage Solution - available at Valley Indoor.
1400 PPM TDS Calibration Solution
C$1.99
C$9.99
Grotek - 1400 PPM TDS Calibration Solution available at Valley Indoor.
2.77 EC Conductivity Standard Solution
C$28.99
Bluelab - 2.77 EC Conductivity Standard Solution available at Valley Indoor.