It's sunny and warm enough for me to try Jerry's grow here in
Pittsburgh. I made up a gallon of the grow formula, and was surprized
at the ppm reading on my calibrated Hanna pH/ec/ppm meter.
Here is what I found.
Initial readings for the gallon of RO water pH (5.2), ec 0 mS, ppm 0
Readings after adding 3 tsp (15 mL) of Jerry's Grow pH (4.9), ec 1.98
mS, ppm 1429
I can easily adjust the pH, but the 1429 ppm value was very large to me.
I often use Dynagrow at half strength which for me gives a low pH, but
the ppm reading is usually around 200 ppm. I have a large phrag
collection and often water with the dilute solution every day.
Anyone have any experiences with confirming these values? Are they OK,
and should I be concerned with the large lumps of whatever that are in
the bottle. Shaking and warming did not cause them to dissolve. These
are big chunks. OK to ignore?