yes they take in co2 and give out oxygen, therefore oxygenating the water and helping your fish breathe.
Among other things, plants process waste that comes from the fish.
The energy for the plants in a fish tank is supplied by Light.
Fish will benefit plants from giving them a place to hide, and food for some.
As long as that fish is in your tank, the other fish will benefit from it's special effect.
The water plants have cells. Plants live. Rocks are not alive.
Co2 and fertilizer in the form of poopy.
fake plants my fish loves them
Plants would provide oxygen in a fish tank.
Aquarium
Because they are fed by humans
the best plant would be a live one plastic plants can cut or damage the fin of your fish
Cause its dead
No, you do not have to put real plants in a tropical tank, you can use fake plants if you like. Many people put live plants for aesthetics as the greenery tends to look very nice with small colourful fish