We have popped a small blue cube into each of the urinals.
Besides giving our male climbers something to aim for, these small blue cubes allow us to operate water free urinals. This saves us 648 litres per day, which is a staggering 235,425 litres per year.
How can a small blue cube make this happen? It is made up of pro-biotic microbes which compete with nasty bacteria for food and effectively starve them out. So, that makes us guilty of bacteriocide as we kill of zillions of the little blighters. Well, we did that before with the use of chemicals. We now use no chemicals in the cleaning process.
Water and chemical free.
It is a large change with very little outlay or effort.