DE also known as Diatomaceous Earth is some form of sea creature? There are different companies that supply it. DE is not necessarily the brand name of the product. You can find it on Amazon.com. I'm not sure how that works with you being down under but just thought I'd give my two cents. I use it for not only my chickens but also my dogs. There is also a human grade of it that I take myself. It's like a cure all (so they say). I also use it in my garden. It kills fleas and other bugs with the quickness! So it would be worth it to get some if you kind find it there. hope it helps 
