The black line tail tetra, also known as the moenkhausia costae, is a striking freshwater fish cherished for its elegant appearance and peaceful demeanor. Its distinctive black tail fin against a shimmering silver body makes it a captivating addition to any community aquarium.. Origin:. Originating from south america, particularly in the river basins of brazil, these tetras thrive in environments with slow-moving waters and densely vegetated areas.. Diet:. Omnivorous by nature, they readily accept a varied diet consisting of high-quality flakes, pellets, live, or frozen foods such as bloodworms, daphnia, and brine shrimp.. Tank mates:. Known for their peaceful temperament, black line tail tetras coexist harmoniously with other peaceful community fish like other tetras, rasboras, peaceful dwarf cichlids, and small catfish species.. Aggression:. These tetras are non-aggressive, making them ideal inhabitants for community tanks. They thrive in groups and display their best behavior in a well-populated environment.. Experience level:. Suitable for aquarists of various experience levels, including beginners. However, proper water parameters and maintenance are essential for their well-being.. Water parameters:. Optimal conditions include a ph range of 6.0 To 7.5, Water temperature between 72 f to 78 f 22 c to 26 c , and moderately soft to slightly hard water.