Title: Tetras in a TankPurpose: We want to see if our fish species can survive in an enclosed tank with no air flow, and with only a marimo moss ball and an anubias frazeri aquatic plant as the only sources of food and chemical processes. Research Background:The Serpae Tetra, also known as the Red Minor Tetra, is a good beginner fish to start with, because of the relatively easy level of care they require & the hardiness of their nature. Their habitat should be spacey, allowing them with plenty of room to move around; tetras are fairly active fish. The water flow should be around slow to moderate, which is perfect because we aren’t using a tank filter. The water temperature containing Red Minor Tetras should be around the range of 72°-82° F. This wide range of temperatures will take into account the fluctuation of the school between day and night. Tetras in general are friendly community fish, although they can be slightly aggressive. They can share a habitat with any other fish; especially other tetras. The Buenos Aires Tetra fish are also good starter fish. They are very active and a strong fish. They like to swim in schools of 5 or more, but don’t mind sharing a tank with other fish. Tetras like to swim around a lot and hide in shrubs. The fish can grow up to almost three inches long and prefer swimming in water that is 72° to 82° Fahrenheit, just like the Red Minor Tetras. Since there are going to be two species of fish in the ecosystem, there has to be a steady source of food. Tetras are most commonly placed with Marimo moss balls. They should avoid exposure to sunlight (the less, the better), high water temperatures, and require very little upkeep. They thrive best with indirect sunlight and water around room temperature Although their annual growth is slow, at 5 mm, the steady rate allows it to flourish up to 20-30 centimeters. These four species in theory should be able to thrive together. Although Red Minor Tetras are slightly more aggressive than Buenos Aires Tetras, they live well together. They are often put in the same tank, especially in pet stores. They both require the same water temperature, both are community fish, and are roughly around the same size. Both fish sizes are small on the spectrum, so the overall waste will be reduced. Since we can’t change the water for a month, we have to minimize waste. The Marimo moss balls and the Anubias Frazeri aquatic plant will go through photosynthesis; this will provide air for the fish, since the tank will be enclosed with no air flow. Hypothesis: If two Buenos Aires Tetra fish and two Red Minor Tetra fish are placed in a tank with a moss ball and an aquatic plant for one month then all the fish will survive because of the natural processes occuring in the tank such as photosynthesis from the live plant and the moss ball. Materials: 2 Red Minor Tetras2 Buenos Aires Tetras1 Marimo Moss ballWater (enough to fill the whole tank)Water conditioner1 Anubias Frazeri Aquatic PlantRocks12 x 20 inch TankProcedure: Gather together two Red Minor Tetras, two Buenos Aires Tetras, a moss ball, water, water conditioner, an Anubias Frazeri aquatic plant, and a bag of rocks. Try to get the same size fish, each around two and a half inches. The tank should be 12 x 20 inches, so that the fish have plenty of room to swim around. First, equally layer the bottom of the tank with the small rocks. Place the plant’s root securely under some of the rocks on one side of the tank. Then fill the tank all the way to the top with tap water. Make sure to put the water condition into the tank so the water is safe for the fish to swim in. This water conditioner filters out harmful substances in water, like chlorine. Put the approved amount of conditioner into the tank and let it sit for a few minutes. Afterwards, place the moss ball in the tank, on the opposite side from the plant. Gently place the fish into the water. Over a month, observe the fish and see if they are still living or if they have any notable injuries. Make sure to observe the growth of the plant, and to check the health of the moss ball. Take note on how much waste is being produced in the tank. Make daily reports on what is happening in the terrarium and make sure to write the dates down if anything specific happens.