The most important thing that you need to know is balance.
Same people will tell you it is hard and others say it’s a piece of cake.
No two planted aquariums are the same, so if one thing works for your friend in his aquarium it does not mean it will work for your aquarium.
Let’s get started,
Plants need 3 things to grow co2+nutrients and you’ve guest it right, light.
In order for the plants to take in the nutrients, there must be CO2 and light present.
When any one of these three things are out of balance, there will be an outward sign to let you know that something is wrong.
Algae is nature’s way of letting you know that you tank is not in balance.
The trick to a good looking and healthy planted aquarium, is to experiment and never to give up,
It does not matter how bad it looks just remember everything looks beter after a water change.
May the Force be with you !