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Old 10-10-2009, 03:56 AM
GpsFrontier GpsFrontier is offline
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Join Date: Mar 2009
Location: Lake Havasu AZ.
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I just thought I would post an update in case it helps anyone. I had e-mailed General Hydroponics with the same exact question and there response was:

"Hello,
I think the only difference is the concentration. Food grade is 10 times stronger. It is also ten times more expensive.
Thanks"

I am not concerned with the concentration because I won't be using that much to go to the time and effort of finding a source for the 35% concentration. One bottle of the 3% from walmart for $1.06 will probably last 6 months. If not whats another $1.06.
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