Hanna Cal Check Solution, case of 25 meters-&-solutions They can be easily mixed

They can be easily mixed with other media for increased aeration and added moisture-holding capabilities

all in the same system

Or drill holes down by a plant when it is already established

NOTE: This bulb is compatible with the Phantom II 600W ballast (PHB2030)

Identify best light level of healthy plants

Hanna Cal Check Solution, case of 25 meters-&-solutions They can be easily mixedThese 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.