We have a 20 foot x 20 foot concrete pond surrounded by bamboo. The leaves keep falling in and we are constantly having to drain the pond to clean it, which is to time consuming, expensive, and bad for the fish. The pond is an odd shape and we have had difficulties in netting it. We have just cut down the bamboo but discovered it's almost impossible to kill off.
Certified GKH Gardening Expert
Here is an article that you may find helpful: https://www.gardeningknowhow.com/ornamental/foliage/bamboo/kill-bamboo.htm
I would cut back the bamboo, and then keep it down till it dies.
or cover the pond with netting