If you want to create a pond, you should consider a few things when choosing the plants. They shouldn't grow too much.
A pond also needs pond plants so that it really comes into its own. One could now assume that one would no longer have to worry about these plants.
Of course, there are no things like watering, fertilizing or loosening the soil. But you still have to take care of the plants. Especially when you're growing. For this reason, when planting the pond, you should already place vigorously growing plants such as marsh or shallow water plants in so-called mesh baskets. This will prevent the plant from spreading through the roots. This includes water lilies. You have to thin them out again and again.
Plants and Fish
Thinning out the pond plants is very important, because they can quickly compete with weaker conspecifics for their habitat. However, this not only has something to do with the competition in the plant world, but is even more important if you have fish in the pond. Then you should not only thin out the plants above ground, but also below ground. You should then cut off water lilies that are spreading too much. It is best if you avoid plants that grow uncontrollably when you buy them.