Floating Dancing Fountain is installed on a floating tank in the river or lake, so the fountain performance won't be affected by the water level changes. The material of the floating tank could be either cast iron or stainless according to the water quality and target budget of the project. Fountain could dance is due to the control system. Generally two type of control modes are available: one is PLC (programmable Logistics Controller), another is customized software which pre-installed on computer. Both type of control modes could adapt to music fountain or non-music fountain.
Link:
https://www.gzfenlin.com.cn/fountain.html