A ditch, tributary of Red river, Thai Binh, Vietnam

_th place in Biotope Aquarium Design Contest 2020

Volume: 216 L
Dimensions: 90x60x40 cm
List of fishes: Macropodus opercularis, Barbodes semifasciolatus,Rhinogobius giurinus, Macrobrachium nipponensis
List of plants: Trapa natans, Pistia stratiotes
Description of decorations: Biotope’s underwater landscape includes plants, drifwoods and mud taken from natural habitat.
Description of equipment: Jebao SOW-4 Wavemaker, 3 DIY 5w COB LED light.
Water parameters: Temperature is 30°C. pH is 7.0


Description of the area surrounding the biotope: Thai Binh is a province located on the Red River Delta where the river flows into the sea. The nature here is very rich with many rivers, rice fields and mangroves.

Description of the underwater landscape of the biotope: The ditch connects with many outflow from rice fields, so its reddish fine sand is covered by many of garbage like sunken leaves and driftwoods.

Description of the parameters of the habitat: Water is transparent. The average temperature is 22.5 , It is nearly 15 in the winter and 30 in summer. pH varies from 7.0 to 7.5 because of the saltwater intrusion.

List of fishes and invertebrates occurring in the nature biotope: Anabas testudineus,Trichopsis vittata,Somanniathelphusa sinensis,Macrobrachium nipponense ,Hypostomus punctatus,Oreochromis niloticus, Cyprinus carpio, Macropodus opercularis, Barbodes semifasciolatus, Rhinogobius giurinus, Trichogaster pectoralis

List of plants found in the nature biotope: Ipomoea aquatica,Eichhornia crassipes, Lemnaceae, Trapa natans, Pistia stratiotes

Threats to the ecology: Macropodus opercularis and Barbodes semifasciolatus are childhood fishes of many people in Thai Binh. However, they are endanger spieces. Human now pollute their habitat by pouring hazardous waste into the river. the increase in number of invasive fishes (Oreochromis niloticus,Hypostomus punctatus) is also a danger causing them to decrease in population. Now it is hard to find these endanger spieces in river, they only can be found in some old ponds or small ditches.

Sources of information:

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