Bluelab® pH 4.0 Calibration Solution - 250ml - Soiless Media ^Ca-Mg-Fe should not be used

^Ca-Mg-Fe should not be used in conjunction with VegaFlora AB or Veg-1 as it will likely cause a cal-mag toxicity

IP65 wet location rated protection against water and dust

Extreme efficiency

Crude Fiber 13%

The unique fabric construction allows for air

Bluelab® pH 4.0 Calibration Solution - 250ml - Soiless Media ^Ca-Mg-Fe should not be usedBluelab pH 4. 0 Calibration Solution 250ml The Bluelab calibration and conductivity solutions play a crucial role in maintaining the accuracy and longevity of Bluelab products. Designed specifically for use with Bluelab devices, these solutions are essential for calibrating pH and assessing the cleanliness of the Bluelab Conductivity Temperature probe. Manufactured with precision and adherence to high laboratory standards to guarantee the reliability