Excluding the salt, I buy all my ingredients on-line from trade-me. I make a big lot at once which lasts for months and months. Enjoy.
Dishwashing Powder1 cup washing soda (powder not crystals)
1 cup borax
3/4 cup oxygen bleach
1/2 cup salt
1/2 cup citric acid
Use 2-3 tbsp per load
Use white vinegar as the rinse aid.