^ How it works
Water from the fish tanks is pumped downwards and then back up, the change in direction allows Mr Casey to remove any
big solids from the system and compost them.
The water is then pumped into a large tank filled with, of all things, milk bottle lids.
Inside the tank good bacteria that lives on the recycled lids processes the waste water into fertiliser.
The water is then pumped into the beds, and onto the plants.
Because the water is constantly flowing, the plants can grow on rocks.
"We've just got to make sure no warm-blooded animals put any faeces in [the system]," Mr Casey said when asked about food safety.
"So we put a shade cloth up to stop any birds from coming in and we also test the water every two days just to make sure none
of those contaminants are coming in and also to test if the fish are producing too much or not enough waste."
The pub grows all its leafy greens, herbs and some veggies from the garden.
Mr Casey said the system allowed them to grow varieties they were unable to buy, and saved thousands of dollars on produce.
"The main thing we focus on are greens; they don't last as long as other fruit and vegetables and we want them as fresh as possible.
Similarly, herbs — plus it allows us to grow a greater variety."
The system was built out of recycled corrugated iron and building materials.
Many of the water tanks were repurposed; water drums were common in the outback and were repurposed in the system.
Mr Casey paid local school kids to collect milk bottle caps for the water filtration tank.
Cardboard from the business was turned into compost, saving the business money and added much-needed carbon to the compost.
Even dying plants are recovered, with local residents donating unwanted and struggling plants which are rejuvenated in the system.
It's a great closed loop system and one answer to self sufficiency in food production.