#769: 568.5L Biotope Aquascape Igarapé Carajizinho near the connection of the Rio Caurés, Amazonas, Brazil

Alex Franqui East Greenwich, RI, United States

Awards and Comments

Third Place
Very well done! Like a dive into the flooded igapó!
— Hans-Georg Evers
This is a very nice interpretation of a blackwater habitat. Unfortunately you went a bit overboard with your species in this space and included one Moenkhausia sanctaefilomenae which is not a black water fish at all. So I had to take points off for that! While it would certainly be possible to glimpse this density of fish in an area it would be unlikely to see this many different species all mixed together in such a small area!
— Karen Randall
Good representation of the Rio Caures locale. The fish look healthy and vibrant in this biotope and are obviously thriving in this biotope. Great job!
— Bailin Shaw

Aquascape Details

Dimensions 122 × 61 × 79 cm
Title Igarapé Carajizinho near the connection of the Rio Caurés, Amazonas, Brazil
Volume 568.5L
Background none
Lighting 2 x 36in Fluval planted 2.0
Filtration 2 x Hydor Professional 600
Plants None
Animals Paracheirodon axelrodi, Hyphessobrycon rosaceus, Moenkhausia collettii , Moenkhausia sanctaefilomenae Carnegiella strigata, Nannostomus eques, Nannostomus beckfordi, Hemigrammus hyanuary
Materials Substrate is a mixture of super fine sand and Tannin Aquatics Naturebase - Igapo substrate, followed by a layer of decomposed coconut coir and detritus, and lastly topped with a mix of leaf litter, small twigs, and a few seed Pods. Oak and bog wood was used to simulate trees.
Additional Information The Rio Negro and its extremely diverse mixture of fish species, and complex habitat has always been among my goals to recreate as a biotope aquarium. I have always been fascinated by the seasonal changes in aquatic environments, and how many of the common species we find in the aquarium trade behave while in the wild. As such I wanted to choose and create a biotope that would look and act like the real thing for these beloved fish species.

Closely located to the area where the Igarapé Carajizinho connects to the bend of the much larger Rio Caurés, which ultimately feeds to the great Rio Negro in the Amazonas state in north-western Brazil, close to Barcelos, Brazil. This biotope is based around a decomposing fallen tree, in an area of igapo with moderately raised water levels, with slight turbidity and tannic acid tint. The inundated forest floor surrounding this log, creates an integral seasonal habitat with an abundant source of refuge and available food within the leaf litter and botanicals for the many species of fish that move into these shallow botanical filled areas. The wood and thick layer of leaf litter produce important biofilms and optimal breeding grounds for microfauna that are a naturally occurring explosion of food for many of the small species of fish lurking between the coverage, while the foliage above water provides food in the form of unsuspecting insects that enter the water surface.

By recreating these naturally occurring sources of food, refuge, and water parameters; we can observe the native species behavior and health in the truest form and see the inhabitants sustainably flourish for a much longer period in their native habitat.

Inspiration and biotope example:

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