I having owned a peticide company in south africa, had experience and knowledge of a lot of what the "Joe Public' is kept in the dark of ( excuse the pun )
I use to sell a product there called BioKill, it is non toxic and uses a specific Permethrin isomer. I know it is totaly non-toxic, because I did some of the toxicity trials on my self, including the drinking of 2 litres of the product per day for five days!!!! Yip it is exstreme, but if you believe in something, you got to put your mouth where your money is too... ( ps, I do not recommend or encourge anyone to do this.)
anayways to cut a long story short, you can't get BioKill in Australia, even though we and others have tried to register it here...( call it closed shop by the old boys club... in some quarters

) but you can mail order it into Australia for personal use only.
but you can get it in Singapore, Hong Kong, most of Europe, the USA and South Africa. It has no smell at all, is like a sopay water in feel. And I will bet my LX200GPS 12 inch, if you spray it on you correctly, you will not get a single mossie or midge bite ( yes
Culicidae family ) for about 4 hours per application
ps,, here is the website ( please modirators don't remove!!!) inspect protecton is something vital in our hobby, combined with Ross River Fever and West Nile Virus and Malaria being killers world wide. It is resposable to pass this knowledge around, so we all can get the best product. Lastly I odn;t own the company and even have contact with the industry any nore.
www.jesmond.com the BioKill site
Tony