The plants i think are some kind of lily with broad leaves, A plant with red leaves growing better than the rest with what appears to be white roots shooting from the side of the plant also i think a grass like plant maybe a valis and last a small dark marbled leaved plant, Six plants in total.
When i bought them i put them into the gravel still in there pots was this ok, the tank holds ten gallons of water, The tube throws out quiet a lot of light, I have not put any plant feed in the tank, I thought that nutrients were put into the water with the weekly water changes?
It is better to take the plants out of the pots, so they can root properly.
Water changes will add a certain amount of trace nutrients back into the system but its better to add a few drops of liquid plant food (such as API Leaf zone). And with heavy root feeders, you need to add root tabs.
A thumb rule for the amount of light required is 2W/gallon. What is the rating of your lamp? I assume its a fluorescent tube.
I hope this helps.