Hot Water System?

Hi

Currently I'm renting a unit in Queensland Australia. I'm not sure if anyone is up to date with the rental laws or not for this area. I've tried the rta website but to no avail.

So the hot water system in the unit we are renting died on the weekend. It was a 125L system (small to begin with). It got replaced yesterday and they put in a 50L system. How stingy is that?

There are four people in this unit and we have 50L of hot water. It is also going to cost more electricity because it has to reheat it more often.

I'm wondering if we have a right to complain about this. The unit owner is stingy and things that have had to be replaced previously have just been a cheap fix.