This Calibration package is everything you home growers will need tokeep a 

Included in this package:

1x Ph Meter

1x Optimum Hydroponix  1L Ph Up

1x Optimum Hydropoinx 1L Ph Down

1x Optimum Hydropoinx 500ml 7 Buffer

1x Optimum Hydropoinx 500ml 4 Buffer

1x Optimum Hydroponix Storage Solution 

Calibration Package

C$59.99Price