This is a tank I got a little bit ago for free from a teacher who was moving from my school.
It is a five gallon tall tank with a built in filter system.
I set this tank up by starting with a roughly inch deep layer of fine gravel. Then I put ontop a layer of sand about an inch deep in the front and 2 inches deep in the back. After, I put two peices of wood from my backyard into the tank along with some small river stones and a fossil. Later I found a tank decor that is a big hollow river stone with two big holes in it making a cave.
For plants, I used water wisteria, java moss, dwarf hair grass, micro sword, water salvinia, and duck weed. I also have a peice of pothos with its roots in the tank as extra filtration.
At first it was home to a small pet bass. I bought him 3 little feeder guppies and 2 feeder shrimp for him to eat. He ate two of the guppies but none of the shrimp. After the bass who I named Boomy wasn't doing so well, I released him back where I found him and found that my single guppy was pregnant.
Since this, my guppy has had around 14 fry and my shrimps have passed. Here's the tank now:
Now I'm building a backyard pond I plan to eventually use to house these guppies and some comet goldfish.