Its a fair sized shop, but not overly huge.
If i am not buying aquarium goods online thats where i go.
The prices are rather good aswell. And they get a nice variety of fish and other things.
I went there today and bought 4 blue rams.
Thought i would try something a bit different other than the good old "king of the aquarium"
Boronia does have a good range of plants, also lots of books on planted aquariums.
Coburg Aquarium also has a good range of plants as well, worth a look if your in Melbourne.
I found a website which was based in Adelaide that ships plants, cant find the link though