The pool grade is dangerous if inhaled so would not be the best type to
work with in treating mounds. It's due to the crystalline form of the
silica in pool grade, being 85% due to heat treatment. It can cause
silicosis of the lungs and probably other problems.
Food Grade is less than 4% crystalline form so much safer although it is
still a respiratory irritant and will make some people and animals
cough, probably just due to the dustiness.
Although chickens sure do seem to love to roll in it in the summer when
lice are a problem for them.
I have bought Food Grade 50# bags from organic garden suppliers.
Janet
Renee wrote:
Hey PT.
I use the food grade simply because it's what we have for us. Perhaps
the pool grade would be fine for fire ants though. My husband HATES
them and would douse them all with gasoline (a VERY quick method of
killing a mound) but I won't let him because I don't like that in my
yard. Although it's been said that the gas vapors just dissipate very
quickly. Still--it stinks, and DE is safe if my pets walk through it.
Samala,
Renee
/-------Original Message-------/
Are you using 'food grade' DE or pool/aquarium grade DE?
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