This may sound familiar. The pond is ready and everyone is happy. But a few weeks later when you do a bit of maintenance for the first time, you notice the flaws in the system. Those points you can’t reach, those spots where the most dirt collects, and maybe a bottom drain would have been a better idea. If thoughtfully carried out, designing and planning a pond before building can save the owner a lot of work and trouble in the long term. Invest more time beforehand and you will benefit from the start. Markus Schröter will tell you how GFRP (glass-fibre reinforced plastic) can make a big difference here.