Hello everyone. i currently have a 20 gallon tank with some serpae tetras and some painted tetras. i would like to add a few live plants to the tank if possible. i don't really know a whole lot about planted tanks so i was looking for some advice. i only have gravel at the bottom of the tank so i would need something that would be able to thrive on just that. currently i have a piece of driftwood with some flame moss on it and a castle. i want to remove the castle and center the driftwood and put some plants on the sides and towards the rear of the tank. i would like to get something that is easy to take care of and not have to mess around to much with fertilizers and such. any advice would be greatly appreciated. if there aren't any live plants that i could use i'm going to get some fake ones but would much rather some live ones and i'm sure my fish would as well. thank you!