09-10-2013, 12:57 PM
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Idk, the pool filter sand bag I got says "safe product without free silica , inert and non-toxic" The other white sand I got was made of something else, but the bag is gone, and I forget the name, idk what to say, it was not silica based anyway.
Maybe it is synthetically manufactured, which I guess opens a whole new can of worms, but it worked fine for me, just my experience. I knew too much silica may be responsible for causing diatoms, so on my sand search I was researching the compositions.
Last edited by angelcraze; 09-10-2013 at 01:09 PM..
Reason: wanted to add something