[Hedgie]

Mate, I think Seaview Aquariums in WA sell ADA stuff. They ship interstate too.

Have you tried the website Aquarium Life? It's probably the best Australian site. I'm sure they can help you locating the soil.

 

[Hedgie]

Buying from a reputable source is pretty safe. I've done it several times with no issues.

 

[Hedgie]

Have you read this?

Mineralised Soil

I'm going to be trying it in my new tank soon. It's not easy getting everything together, but the end results look pretty damn convincing. Alot cheaper than Aqua soil.