Black water stream Sungai Nibong, Sibu District, Sarawak, Malaysia

_ place in Biotope Aquarium Design Contest 2019

Volume: 59 L
Dimensions: 39х39х39 cm
List of fishes: Sundadanio axelrodi, Pangio oblonga
List of plants: Cryptocoryne yujii, Homalomena sp. from Calimantan
Description of decorations: Amber sand 0,4-0,8мм, leaves, driftwood.
Description of equipment: External filter Eheim Classic 2211, a phytofilter in the HOB filter case, Odyssea Clean 100 skimmer, self-made 5000K CRI 90+ lights. The aquarium was set up in October 2017.
Water parameters: Temperature +25C, pH 5,5, TDS 25-30, kH 0 gH 1-2
Additional info: RO water, HOB hydroponic filter, peat in external filter

INFORMATION ABOUT BIOTOPE

Description of the area surrounding the biotope: The Sungai Nibong stream is one of the small tributaries of the Rajang River, flowing in a forest area east of the city of Sibu, Sarawak. Beginning in peat bogs, the stream flows through the forest to the open countryside, in this area, brightly lit by the sun, water plants appear that cover the bottom of the stream. The banks of the river are densely covered with bushes and grass. Since the large river is not far away, there is a danger of encountering crocodiles.

Description of the underwater landscape of the biotope: The bottom of the stream consists of clay and sand, it is solid, covered with leaves, detritus and forest debris, there are driftwood and branches there. In the creek Cryptocoryne yujii grows, on solar plots forming dense clusters. In the underwater shootings there are Sundadanio axelrodi.

Description of the parameters of the habitat: The water is clear, saturated brown, contains many tannins, it is acidic and mild. pH is about 4.5. The flow is fairly fast. After the rain, the water rises and becomes turbid, the cryptocoryns are held in current, with their roots stuck in each other. The temperature is 25-28 degrees Celsius.

List of fishes and invertebrates occurring in the nature biotope: Sundadanio sp, Betta sp, Pangio sp.

List of plants found in the nature biotope: Cryptocoryne yujii, Barclaya motleyi.

Threats to the ecology: N/A

Sources of information:
http://images.vfl.ru/ii/1564521287/f9247b41/27385687.png
https://youtu.be/gn5tdsHdl1g?list=PLm28f1w9Xbrdpw6rBf8a139nX1yI19M_E
http://illumbomb.blogspot.com/search/label/C.%20yujii
http://junglemikey.blogspot.com/2012/05/cryptocoryne-yujii-in-sibu-area.html
https://crypts.home.xs4all.nl/Cryptocoryne/Gallery/yuj/yuj.html
https://www.seriouslyfish.com/species/sundadanio-axelrodi/
https://www.loaches.com/species-index/pangio-oblonga
https://www.seriouslyfish.com/species/pangio-oblonga/

Comments of the members of the jury of Biotope Aquarium Design Contest 2019