bam Very demanding level

Igarapé do Daracua, Rio Negro, Barcelos, Brazil

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Brazil, South America, South America

This time I want to show a small stream of the Rio Negro River – Igarape do Daracua near Barcelos, Brazil.

This place interests me a lot, that’s why I tried to recreate this biotope in the aquarium, so my experience can help other aquarists.

My biotope contains wood, twigs and lots of dry leaves. And for the fish I only used Paracheirodon innesi and Petitella bleheri. There are actually many small fish living there, but as my tank measures only 100x40x40cm, I decided to use two species that live in groups – I don’t want this tank to be overpopulated.

I do not use aquatic plants, because in the original biotope there are none at all, except for the vegetation that grows from the seeds of the surrounding trees.

Submitted by
MAA Rafsanjani
Approved by
Roberto E. Reis, Pablo C. Lehmann and Flávio Lima
GPS
-0.4899390, -63.2024994
Geographical region
South America
Drainage Basin
Rio Amazonas
River catchment
Rio Negro
Water body type
Igarapè
Water body name
do Daracua
Water body part
River mouth
Water body course
Lower course
Water body: tributary of
Rio
Tributary name
Rio Negro

Videos above and below water

Water Chemistry

Water information

Water type
Fresh water
Water color
Black water
Water transparency
Medium
Concentration of sediments
Medium
Water temperature
26 °C
Water flow/curent
Slow

Chemical parameters

pH
7.0
Conductivity
8
GH
4 mg/l
KH
4 mg/l
Dissolved Oxygen
90 %

Aquarium information

Aquarium description

Set-up date
March, 2023
Aquarium decoration

All of this organic material releases a lot of tannin, naturally turning the water black, and also lowers the pH, maintaining it at around 4.0.

My biotope contains wood, twigs and lots of dry leaves. And for the fish I only used Paracheirodon innesi and Petitella bleheri. There are actually many small fish living there, but as my tank measures only 100x40x40cm, I decided to use two species that live in groups – I don’t want this tank to be overpopulated.

Aquarium equipment
  • Spotlight Philips 25 watt used for the effect of sunlight
  • Canister filter filled with sponge and synthetic cotton
  • Pump engine: takari 1800, 1600 L/H, 30 Watt
  • Wave Maker Recent AA WM 24000, 24000 L/H, 25 Watt for use once a week once a day, fast water mode
  • Wave Maker Amara AA 8710, 3000 L/H, 6 Watt for daily use
  • Kandila S Series lamp, 10,000 K, Spotlight Krisbow 25 watt used for the effect of sunlight.

Fishes:

  • Paracheirodon innesi (Characidae) – 10
  • Petitella bleheri (Characidae) – 10
Fish care

The fish are fed once daily, preferably with food designed for tetras and occasionally with live baby brine shrimps.

Plant care
Water care

None, major flora are absent in my biotope. I only change the green Bactris major leaves once a month when they start to deteriorate.

Dimensions

Length
100 cm
Depth
40 cm
High
50 cm
Volume
148 L

Substrate in aquarium

Sand
Beige
Pebble/Gravel
Mixed
Stone
Mixed
Stone form
Roundish
Silt/Mud
Reddish
Leaves
Adundant
Driftwood
Many
Submerged terrestrial vegetation

Comment by the expert

Roberto E. Reis: Fish and decoration selected properly, with two fish species, one aquatic plant and lots of beautiful green algae. The aquarium looks attractive and beautiful, with tank and fish displayed in four photos and the video with combined biotope images. Description of tank and external resources good.

Flávio Lima: It is a well decorated and balanced biotope.

Pablo C. Lehmann: Aquarium with a good representation of the natural habitat, although simple, but includes two species that are very representative of the environment.