The bricks in the tank is an old water saving trick. We remodeled six years ago and you can only buy water saving toilets here in California now. They work pretty well, but (TMI) sometimes those need to be flushed 3 times to clear the bowl. In those cases you are actually using more water. Where we really us water here is on the lawn. Our summer water bill, when it is regularly over 100 degrees is when it goes up. And while my entire front and backyard are lawn, my lot is only .17 acre. My parents house was on half an acre, and all lawn. But there was no water district of bill for them, everyone had their own well so you just paid for the electricity to run the pump.