Yes, this is a 5-gallon tank with fine black sand substrate and live plants.
I now have 3 celestial pearl danios, 1 otocinclus, 1 Malaysian trumpet snail.
I do not use fertilizer. My plants have gone crazy without it. I have one betta bulb, 1 large "bunch" of java fern (I'm pretty sure), and this other plant in the photo, which came in a little pack of gel from Petco. It started out as about a dozen tiny (half-inch) blades of "grass" that has now grown into this lush plant that is probably 8 inches tall now. If you know what it is, please tell me.
I now add 2 drops of Prime (from a medicine dropper) for every gallon of water I add back into the tank. I use a bucket that I got from Lowes that has a 4-quart mark on it so it is pretty accurate.