Aquarium release chemical used in Whale Sharks tank for the first time

[Steve Fox]

Full Story

http://www.ajc.com/metro/content/metro/atlanta/stories/2007/06/15/0616lvnorton.html

Quote from the article ''parasite chemical — Trichlorfon — used to treat the whale sharks' tank, shortly before the marquee fish got sick last year''

[Steve Fox]

Toxicology sheet for chemical used

http://pmep.cce.cornell.edu/profiles/extoxnet/pyrethrins-ziram/trichlorfon-ext.html

Effects on Aquatic Organisms
Trichlorfon is highly toxic to both cold and warm water fish; its acute toxicity to freshwater fish is between 1.67 and 180 ppm (17). The 24-hour LC50 for striped bass was 10.4 ppm. The 48-hour LC50 for rainbow trout was 3.2 ppm. The 96-hour LC50 for fathead minnow was 180.0 ppm (12). Studies did not show a potential for trichlorfon to accumulate in nontarget fish