After the heater broke in my shrimp tank, I purchased an excellent brand I always use from tech den. It went from Caboolture to Brisbane to Sunshine West Victoria, back to Brisbane then to the Sunshine Coast for delivery. Friday to Wednesday from a store 45min away. In the meantime I had to spend $50 on another heater/brand from Petbarn as the tank went from 23 degrees to 18 degrees over night. Fastway/Aramax delivery used to be offered as an alternative delivery service to Australia post, but not now. This would be a more reliable delivery option for your customers.