Cochu's Blue Tetra Care Guide

Bohlkea fredcochui, the Blue Tetra, is a relatively less common species of Tetra native to the Amazon Rainforest basin. Decorated in a vibrant blue, the adults make an excellent addition to planted tanks. However, they are equally comfortable and easy to care for in non-planted tanks. Like many Tetra species, these are certainly what would be described as a schooling fish and it is highly encouraged to keep as many specimens together as your tank will allow. These have become a popular staple here at Aquatic Arts due to the coloration, their ease of care and their tank bred nature.


Generally found in slower moving waters in the Amazon Basin, this fish is often found in highly dense plant growth and other areas that are shaded by natural vegetation. Because of these factors, this fish finds it’s best coloration and behavior in planted tanks. Mentioned above, this animal also prefers large school consisting of many dozens of individuals. Keeping at least a dozen is recommended and this will lead to the best coloration, behavior and chance to see breeding. These large groups also give the benefit of offsetting any nippy behavior that many Tetra species tend to exhibit.


Keeping this species is very easy, with it being one of the hardiest animals available in the hobby. Aquatic Arts sources only tank bred specimens, lending the hobbyist even more leeway in their already lax water quality necessities. We keep them in the following parameters here and have found great success:

Temperature: 72F – 82F

pH: 5.5 – 7.6

kH: 5 – 12


With regards to these parameters, it is important to note that all are flexible with slow acclimation. In fact, many breeders report better success in hatch rates at temperatures elevated above what we recommend and a pH towards the lower end of the range. We also have heard success stories of them being kept in Indiana tap water, which has a pH approaching 8.4 in many instances. So rest assured you are likely to find success with these specimens. Some individuals have reported unusually rough reactions when exposed to any level of salt in the aquarium, although we can not independently confirm this.


Cochu’s Tetras are additionally easy to feed, accepting almost anything that is provided. A general flake food is often the best choice for this purpose. However, it is always recommended to provide a variety of dry, freeze-dried or frozen food choices to ensure the proper range of nutrition is available. This becomes very important when preparing to breed, or raising fry of any species.


Currently this species is not listed on either CITES or the IUCN Red List due to it being not evaluated at this time. With that said, many species in the Amazon basin are routinely collected and shipped abroad from wild populations. With any animal, we strongly recommend purchasing tank bred specimens if possible. Considering the ongoing development of the Amazon Rainforest, it is likely that these fish and others, have lost valuable habitats and we would encourage you to always source responsibly!

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