Ice911’s #1 rule is “first do no harm.” Our solution is safe for humans, animals, aquatic life, and ecosystems.
The manufacturers of our reflective silica have conducted their own safety testing, often called ecotoxicology testing, with no ill effects observed. We also contracted an independent lab to test on a representative specimen, meaning one type of specimen is tested to represent a gamut of species. Here are the summarized results:
Humans, birds, and fish alike ingest silica regularly. Birds look for and select larger grains of silica to aid digestion in their stomachs and fish swim through it at about one part per million of ocean water. Most importantly, because we've all co-evolved with silica, it does not bioaccumulate (i.e. it doesn’t become concentrated inside the bodies of living things).
Materials under 10 micrometers (micrometer = one millionth of a meter) are determined to be harmful to human respiratory health. We take in particles like dust above 10 micrometers with every breath, and particles not filtered in the nose come out of the lungs through a mechanism called the mucocillary escalator in the respiratory tract. This system is a wall of mucus in the respiratory tract that catches particles above the 10 micrometer threshold and brings them out of the body.
Our reflective sand silica is far above this threshold, with an average diameter of 35 micrometers and a perfectly-spherical shape, so that if inhaled by any creature, it will be expunged by the mucocillary escalator.