Saving water by reusing slightly dirty water for flushing toilets - seems a no-brainer. At Kanthaus, we operated a DIY greywater recycling system for almost 6 months, from January 2018 to June 2018. Even though the system did save us about 30% water, we decided to turn it off. But it's not that the system was bad in general - there are just some important bits to watch out for. The reasons why we turned it off were: frequent clogging of the toilet refill valves and a strong stench that developed after some weeks.