Hanna Cal Check Solution, case of 25 veg-and-bloom you can test both the

you can test both the pH of soil directly or after preparation of a diluted sample

healthiest organic matter

• 50 cell insert (tray not included)

SNS 203's concentrated active ingredients attack fungus & algae and cause pests to dehydrate and dry up

Hanna Cal Check Solution, case of 25 veg-and-bloom you can test both theThese sachets are for use with the Hanna HI9813 6 GroChek portable pH TDS EC Temp meter, which utilizes the Cal Check Solution to determine whether the probe is in need of cleaning or replacement. The sachets should only be used once, then discarded, in order to avoid contamination and improper readings.