Phosphoric Acid Food Grade vs Tech Grade

I have two choices one is Food Grade and one is Tech grade 75%. The tech being 1/3 cheaper of the two.

Here are the test results for each. Can anyone tell me the quality difference between the two obviously one being food grade but is there much difference between the two in purity vs feeding it to plants for human consumption.

I'd be worried about the aluminum and arsenic. Just buy it in powder form and make your own stock solution.

LurchLurkin said:

I'd be worried about the aluminum and arsenic. Just buy it in powder form and make your own stock solution.

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I found a local source for food grade besides most of the hydroponics manufacturers don't use food grade any ways and you're not suing that much.