![]() If they are not part of a school, they will become stressed and thus more prone to aggressive behavior. As mentioned earlier, Blue tetras are schooling fish. To make them feel more comfortable, make sure to add them to a group of 6 or more. This delicate fish is evasive and will always avoid trouble. Blue Tetra Compatibilityīlue Tetras are peaceful in a community tank. ![]() It is important that you do not overfeed, as it can lead to a wide range of issues, including indigestion and deteriorating water conditions. If the fish are still eating 5 minutes after the start of feeding, then you have given them too much food. To avoid overfeeding, provide enough for the fish to eat in 5 minutes. If the food is too big, break it up into smaller pieces. Since tetras have small mouths, make sure to provide food that will fit into their mouth. Good examples include brine shrimps, daphnia, infusoria, bloodworms, tubifex, and earthworms. To complement their diet, you may use live foods, freeze, or freeze-dried foods. To reduce pH levels, you may use peat moss, driftwood, pH buffers like the Seachem Acid buffer, or botanicals such as Indian almond leaves. Make sure to add 2 gallons for each additional fish.īlue tetras will thrive in an aquarium whose pH levels are between 6 and 7. A 10 gallon or more aquarium will be adequate for that many fish. The Blue tetra is a schooling fish, so you will need at least 6 of them in the same aquarium. Typically, Blue Tetras will be between 3.75 to 4.25 centimeters in size or 1.5 to 1.67 inches. ![]() ![]() Males however will show stronger coloration, especially during mating.īlue tetras are small when compared to some other tetras like Diamond tetra or Congo tetra. Males will tend to be smaller than females, who are have much rounder bodies. Blue tetras can be slightly transparent, giving them a glass-like appearance.īlue tetras are sexually dimorphic. Their lateral line generally shows deeper and shinier blue coloration than the rest of their bodies, especially in the rear half. The deep-bodied, similarly to Cardinal or rummy nose tetras. Their bodies show reflective blue coloration, with hues of pink and green. The blue tetra’s appearance is quite beautiful. Knodus borki, CC BY-SA 3.0, via Wikimedia Commons. The Knodus borki is endemic to tropical freshwater environments in Northeastern Peru, near Iquitos. The first part of his name, Knodus = “knife” or, “sword.” The second, borki, refers to an aquarist and fish photographer, Dieter Bork.įor a long time, however, the Blue tetra was commonly misidentified with the Boehlkea fredcochui, also known as the Cochu’s blue tetra. Knodus borki, its scientific name, is from Greek. But I have grown fond of my Blue tetras, having spent many hours starring in their aquarium. Having had these for over 5 years, I might be biased. ![]() I thought it would be a good idea to write an article about this underrated species for which the world needs to know about. Relatively speaking, the species is not as common as other tetras and is not typically found in pet stores or local fish stores. The Blue tetra’s iridescent blue and silver coloration provides an amazing sight, especially in a dark-background planted aquarium. The Blue tetra (Knodus borki) is a stunningly beautiful addition to an aquarium. ![]()
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