Maintaining the quality and accuracy of your TDS sensor reading is essential to understanding and analyzing the quality of your aquarium water.
 To calibrate your TDS, you will need two calibration solutions, EC 84 μS/cm and EC 1413 μS/cm
 We recommend calibrating the TDS Electrode every 6 months.
 We do not recommend reuse, for this reason, we offer them in 20 ml tubes which are sufficient and ideal for calibration and safe disposal.