it is filtered with a 20 something or another filter that was sold with the 20g aquarium
the lighting came with the topfin aquarium at petsmart
it is not heated, as we live in texas, the temperature in our home stays around 75-77degrees...sorry not sure how to answer this?
lava rock, blue gravel, some fake plants and we just added one live bushy sort of plant yesterday. And an alien skull at the bottom. WE also have glass stones, marbles, and some sea shells on the bottom of the tank.
we use tropical fish flake food, as well as the pellets for the cory.