... what diatoms are used for? Diatoms and diatomaceous earth are used for (in no particular order): filtration cosmetic uses (exfoliation) used to be an abrasive in toothpaste (to keep your teeth white and clean) insecticide cat litter and deodorant stabilization of dynamite thermal insulators (https://patents.google.com/patent/US6033591A/en) energy converters (https://pubs.rsc.org/en/content/articlelanding/2017/ta/c7ta02045g#!divAbstract) liquid absorbant paint matting agent plant soil models for car tires medicine! clotting agent (https://pubs.rsc.org/en/content/articlelanding/2019/bm/c9bm00099b#!divAbstract) cancer fighting(https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5983296/ and video) You will notice the 20% or more oxygen of the atmosphere due to them are not even listed. ^^ What more uses can you think of? Diatoms rock!