Quote Originally Posted by 1Wonder
My tap water(well water) is 7.0 and I have to use PH UP with my Foxfarm Nutes for flower as they drop the PH to around 5.
But when I use my Tapwater just for watering I have been adding a few drops of PH Down to lower it from 7 to around 6.7.
Is This NOT a good thing to be doing as It has been worrying me if I am doing the right thing.
Actually, I've been using FF for a couple of years, and regularly test my ph pen against calibrating solution. I'm confident enough with my numbers to stand by 'em, give or take a .05 range either way for different batches, age of product, different testing methods...

What do you use to test your ph? FF bringing it down to 6.5 I could understand, but 5.0 is unthinkable under normal dilutions.

From experience...If my tapwater ws 7.0 and I used Fox Farms, I doubt I would feel a need to adjust the water one way nor the other, unless additives added to this ph shift. Stuff like Botanicare Sweet and CalMag Plus are very acidic, molasses is slightly acidic...and I'd likely account for that in some way. But the FF line itself should be fine with tapwater at 7.0 ph.