Bluelab® pH 4.0 Calibration Solution 500ml propigation Genuine leather accents

Genuine leather accents

enzyme production and a multitude of important plant processes

8 for hydroponics and 6

Stores up to 20 measurement readings

With an NPK ratio of 1-5-4

Bluelab® pH 4.0 Calibration Solution 500ml propigation Genuine leather accentspH measuring equipment must be cleaned and calibrated regularly to ensure they are giving the user accurate readings. pH instruments are calibrated to pH7. 0 first (buffer) then to pH4. 0 (slope). Bluelab's EC CF equipment does not need calibrating as they are all factory calibrated. The CF27. 7 (EC2. 77) solution is used as a reference or checking solution to ensure you have adequately cleaned the EC CF probe.