I really want to add more plants, but I may have set the current up to fail. I have one amazon sword, one anubias nana and a lucky bamboo which is half submerged. All I have is a general flourescent 15w T8, and my substrate is river rock from Petco.

I added Aqueon plant food and it says it doesn't contain phosphates or nitrate

Should I add Seachem flourite or something under my gravel while the tank is still cycling? And if I need a better bulb, what type of single bulb would be sufficient for a few swords and such?