Igarapé do daracua an tributary of the rio negro near barcelos, Brazil

_th place in Biotope Aquarium Design Contest 2020

Volume: 135 l
Dimensions: 50x60x45 cm
List of fishes: Hemigrammus Bleheri, Paracheirodon Axelrodi,Prionobrama Filigera
List of
plants: None
Description of decorations: The decoration is made of fine sand covered with a litter of dead magnolia leaf which gives this tea color.

 For the decoration of the biotope I used hazel tree stumps to recreate the natural habitat with a mangrove root
 Hazel stump was found in forest

The plants that I used for the chamardoreara decoration as well as palm leaves.
Description of equipment:

double filtration on enhancer foam

2x 400L / h
Pump. ATMAN HP 4000 35L/min
Ramp chihiros 5800 Lumens


Water parameters: Temperature 25.5°c ph 6
Additional info: –


Description of the area surrounding the biotope: The Rio Negro is the second largest river in South America with many river tributaries that ultimately end up with smaller forest streams.  One of these forest streams is Igarapé do Daracua located near Barcelos.
Daracua village is located in an inaccessible place deep in the Amazon rainforest, and it’s easiest to get there by boat.
of the underwater landscape of the biotope: This black water habitat strewn with dead leaves characteristic of the middle of the Rio Negro and is home to a diverse group of fish species.

 Here in the shallows of a small area of ​​flooded forest not far from the town of Barcelos, dozens of familiar species of aquarium fish live among the tangle of roots and fallen branches.
 water also carries a significant amount of organic matter, which serves as a food source for many fish and invertebrates.  Fallen branches, bark, pods and a dense carpet of fallen leaves line the bottom in areas near the water’s edge, providing not only abundant shelter, but also a rich source of detritus and biofilm for  grazing fish.

The dense leaf litter covering the bottom provides both food and shelter for many species
Description of the parameters of the habitat: especially during the low water season, is hot (28-30C), extremely acidic (as low as 3.5 pH in this particular habitat) and with almost no mineral content.  It is rich in tannic and humic acids, both of which contribute to the dark brown coloration.
List of fishes and invertebrates occurring in the nature biotope: Nanostomus eques, Dicrossus filamentosus, Crenicichla notophthalmus, Mesonauta festivus, Acarichthys heckelii, Crenicichla marmorata, Heros notatus.
List of plants found in the nature biotope: there are no aquatic plants, except plants flooded with forest
Sources of information: 



Comments of the members of the jury of Biotope Aquarium Design Contest 2020