They are vital if you have fish in your pond as they add oxygen to the water ... happily sit in 15-30cm of water and shallow ...

Rising temperatures make plants lose more water, weakening their ability to absorb carbon dioxide and survive heat stress.

Plants play a key role in regulating Earth’s climate, but recent research suggests that rising temperatures could disrupt this balance, because plants are leaking more water than previously thought.

Chlorophyll absorbs sunlight and uses its energy to convert carbon dioxide and water into glucose. Oxygen is also produced. Time for a demo here. Here we have the aquatic plant named Cabomba.

Chlorophyll absorbs sunlight and uses its energy to convert carbon dioxide and water into glucose. Oxygen is also produced. Time for a demo here. Here we have the aquatic plant named Cabomba.