I haven't found the pH down to do anything negative to the plants but I wouldn't bother changing 6.4 to anything else. I never need to raise mine as my tap water is above 7 and the Armor Si raises it even higher.
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So you are watering with water that is above 7? 7.5, 8?
Yes sir and yes sir. They still sitting here next to me so I'll get another test shortly.I'd give it longer than that for the soil and water to infuse. Shake every 15 mins for an hour and then let it sit for an hour.
Just checking...this was distilled water yes? Also, I run 1tbs soil/8oz water.
You had a potato field? Idaho? With UK bugs? Weird!How far down did you go for your sample? I saw 2 inches, 6 inches and when we used to do it in the potato feilds, we had a metal probe that could go a foot or two depending on how hard the soil was. Those got sent to the state though.