Test the soil PH for my marijuana plants

A question from a fellow grower:

Whats the best way to test soil ph?

Get some soil add some distilled water shake it dip in PH strip.

I would advise that you test the run off from the container after watering. If the ph is too far off form the normal 6.4-7.0 PH; Then adjust accordingly.
Dolomitic Lime (pulverized) is a good way to balance the PH of your soil.
Also; Adding Epsom Salts will add Magnesium and help keep PH in balance.