Hanna pH 4.0 Calibration Solution - 500ml Size:500 ml 99 PPT / PPM: 0

99 PPT / PPM: 0

This efficiency coupled with the directional beam of the LEDs and the self-cooling system

Use with Athena Pro Core for a complete and balanced recipe

• Use on most indoor plants including flowers

Hanna pH 4.0 Calibration Solution - 500ml Size:500 ml 99 PPT / PPM: 0HI7004L & HI7004P is a premium quality pH 4. 01 calibration solution that is NIST traceable and supplied with a Certificate of Analysis. Hanna calibration buffers have the lot number and expiration date clearly marked on the label and are air tight with a tamper proof seal to ensure the quality of the solution. Air tight bottle with tamper proof sealEnsures quality and freshness of solutionColor coded label for easy pH buffer value identificationEasy