Pool in the rio negro of Brazil

_th place in Biotope Aquarium Design Contest 2020

Volume: 65L
Dimensions: 60x30x36cm
List of fishes: Dicrossus filamentosus, otocinclus mariae, Nannostomus beckfordi
List of plants: N/A
Description of decorations: The leaves on the floor used graviola leaves.
I thought the plant was suitable for my tank concept because it was a common tree in the subtropical climate.
The water flow is very low because the pool is reproduced.
So all the materials used on the floor were light
and, water is black water I reproduced this. With coconut shells and various leaves,
Description of equipment: filteration system: ehime classic 350, atman pre-filter
light system: twinstar 600es
Water parameters: Temperature: 26°c
PH: 6.5
GH: 5
Additional info: water change is 30 percent once a week.

INFORMATION ABOUT BIOTOPE:

Description of the area surrounding the biotope: Rio Negro is a branch of the Amazon River.
It is 2,250 kilometers long and passes through Brazil, Colombia, and Venezuela.
During the rainy season, the river is overflows. when dry season and evaporates in part, causing the connection to break and create independent pools.
My tank reproduced it.
Description of the underwater landscape of the biotope: water is black water.
The river flows through the rainforest, so there are many trees around it, and as a result, there are many leaves and small branches in the water.
Also, the sand on the floor has small particles because of the low water flow.
Description of the parameters of the habitat: In rainy season average temperature is 23°C Ph is about 6 but, In dry seasob average temperature is 28°C ph is 4~6.
List of fishes and invertebrates occurring in the nature biotope: apistogramma mendezi, nannostomus beckfordi, otocinclus, dicrossus filamentosus, Petitella georgiae
List of plants found in the nature biotope: tonina sp, Echinodorus grisebachii
Threats to the ecology:
Sources of information: