Aquatic Plants not only look great in a fish aquarium, but they provide a whole host of other amazing benefits. They act as great filtration, provide the water with oxygen, absorb carbon dioxide created by tank inhabitants, combat algae growth and provide shelter for your fish to hide in.
So plant selection is mandatory thing that needs attention and thinking. because it is the only part that, without sufficient light, your live plants would not be able to process the carbon dioxide in your pet tank , ultimately turning it into must need oxygen for use in respiration for livings.
Plants obtain a large proportion of their nutrients through the roots and from the surrounding substrate. The substrate in the aquarium must therefore be a suitable rooting medium and a provider of nutrients.