Alto Rio Negro

47th place in Biotope Aquarium Design Contest 2016

greece Greece. George Pantazopoulos

Aquarium Volume: 160 L
Fish and invertebrates: Corydoras adolfoi, Paracheirodon axelrodi
Plants list: None
Biotope description: The aquarium was set up based on the biotope of the Rio Negro basin and more specifically, the Alto Rio Negro region, where corydoras adolfoi are found to be endemic. The main characteristic of the water in the region is its rich dark color, which can vary from yellow, to orange, to brown(depending on the season and locality). This is caused by the high volume of humic acids and tannins, leached continuously into the water by the surrounding vegetation, and decomposing organic matter. As a result, the water has almost zero carbonate hardness and very low ph, typically 4-6 depending on the season. As such, the water in this tank is maintained at those levels. The wide range of soil types found in the region-the main ones being Oxisols and Spodosols- also plays a major part to the color and acidity of the water. I tried to represent an area of flooded forest as I imagined it, with submerged logs and branches, as well as dead leaf litter and turf. The other species present in the tank (Cardinal tetra) is a type of fish that is found throughout the Rio Negro river and its tributaries and is known for occurring alongside hundreds of other species.

Photo Gallery

Comments of the members of the jury of Biotope Aquarium Design Contest 2016

What a great representation of this part to Rio Negro. It really looks like absolutely nature, the water colour, leaf litre organic substrate and also the lighting of the aquarium. You have caught the real atmosphere of this river.

Dimitris Ioannou (Greece)