Wow saving 17.000 gallons of water a year , with a little maths and assuming a modern toliet at 6 litres per flush that works out at 35 flushes per day, which if thats the case,  ;D   thats alot of hay a shed load of peat and a tractor trailer full of sawdust However you should had very fertile land within six months. (Id start a mushroom farm if I was you) ;)