Yesterday I purchased an Amazon Sword from my LFS to go in my betta breeding tank. This is my first ever live aquatic plant. What do I need to do? I do not have a canopy as it is a 5½ gallon and the LFS didn't have one for that size, but it is in direct sunlight. What do I need to buy for this plant to keep it healthy. Does my plant act as a "filter"? My 5 gallon only has an aerator at the moment. I heard something about CO2, do I need to buy this? What about aquatic plant fertilizer/food?