FYI I've read some posts lately about how do I tell soil pH. Here is how you determine the pH if you already have a pH meter. I got this from the USEPA manual on test methods, i think it was SW846 regs but that doesn't matter. Take 100 grams of soil (about equal to scoop of ice cream) and place in a container, jar etc... Add 100 milliliters of distilled water Shake,stir, agitate etc for 5 minutes Let settle for one hour (or less depending on the amount of setteable solids - clay) Stick the pH probe in and read the pH The actual test method says 20grams/20 mils but that's not enough fluid to get the probe. Make sure you have equal grams to mils and the ph will turn out the same. Hope this helps! BPP