Do aquatic plants need soil?

Aquarium plants also need soil to grow well. They need nutrients from the soil and the right kinds of fertilizers to stay happy and healthy. However, you cannot use the same soil you use for land plants in your aquarium and must use aquarium soil instead.

I just knew about it. That it uses different soil not the land soil. Is that similar to water soil since they are aquatic plants?

Aqua Soil/Amazonia is produced from natural black soil as a base material, and it is very effective for growing aquatic plants, but there is a case the aquarium water turns yellow at initial stage of aquarium setup, due to the property of humic acid, contained in the black soil. Though this can be used in high tech tanks.