You can get Star San if you want but it's expensive because it's imported from America. We sell 500ml bottles of the same formulation on our website here:
https://www.kegland.com.au/phosphoric-acid-blend-sanitiser-500ml-starsan.html
If you want a real bargain we have a few sold even cheaper here:
https://www.kegland.com.au/stellars...sed-similar-to-starsan-secons-containers.html
I would agree with the other comments here. Do NOT use any chlorine based chemicals as the taste threshold is so incredibly low. So even if you get only get a few parts per billion it starts to become noticeable in your beverage. The issue is because you have to wash the chlorine out so thoroughly you end up significantly increasing the chance of introducing more microbes.
Some people use peroxide, sodium percarbonate or other types of "oxy/oxygen based" cleaners as a non-rinse sanitiser but we would not recommend this either. Mainly for these reasons:
1. You really need a surfactant if you are using a non-rinse sanitiser and sodium percarbonate on it's own will not have this.
2. Sodium percarbonate can affect the flavour of the final beer if the peroxide comes in contact with wort.
On the other hand the ingredients in Stellarsan are all edible, they can be metabolised by yeast and also they have very high taste threshold so even if you accidentally get some in the finished beer it's no big deal.
There are some products that claim to be "single step" sanitisers and cleaners but we have never seen anything anywhere which does a good job of both well so unfortunately this type of thing is too good to be true. You have sanitisers, and you have cleaners. If you really want to do a good job of both you need two products.
We should also say we have our own Powdered Brewing Wash formulation that is coming out next month too. This will be $9.95 per 1kg container so it will be great value and works as well as other Powdered Brewery washes that are double the price.