![]() Try to ensure that the readings are within the parameters listed above. Ensure the aquarium has been cycled and chemically tested.This will help make the fish more secure in the environment and less stressed. Tetras are best purchased as a school of at least 3 to 4 of the same species. They are usually around $1 each and even less when purchased in a school. These are easily identifiable by their bright red and neon blue stripes. An excellent, reasonably priced tetra to trial as your first tropical fish is the neon tetra. Discuss stocking options with your local fish store and mention your concerns about compatibility before making any purchase decisions. Although tank bred varieties will tolerate elevated levels of pH or dH, lowering these will help them thrive.Ī few species of tetra like the Congo Tetra tend to be more aggressive and are best kept in a species aquarium. This explains their need for softer water conditions and lower pH. Tetra species are originally South American streams including the Amazon. Elevated levels can be reduced by adding aquatic plants and increasing the number of water changes. Any reading under 40ppm is suitable for keeping Tetras. Nitrates should always be as close to 0ppm as possible.Tetras are sensitive to ammonia spikes.Both males and females can grow to around 2".This will replicate relatively soft conditions similar to the amazon. Relative water hardness should be 4kH - 8kH.Tank bred Tetras may accept lower or higher pH depending on the store water parameters. Their life span will also become shorter. ![]() When housed with Discus at 80☏+ Tetras will generally have a higher metabolism and become stressed more easily.
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