bam Demanding level

Flooded Forest, Lower Rio Negro, Manaus, Brazil

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Brazil, Amazon

The 360L aquarium is meant to represent a small flooded part of the rainforest in the Rio Negro near Manaus. It consists of fine, beige sand which is provided with a lot of foliage mainly consisting of sea almond tree, jackfruit, mangrove leaves and branches.

Submitted by
Gökhan Kiyici
Approved by
Roberto E. Reis, Pablo C. Lehmann and Flávio Lima
Geographical region
South America
Drainage Basin
Amazon basin
River catchment
Rio Negro
Water body type
River
Water body name
Rio Negro
Water body part
Marsh land
Water body course
Upper course
Water body: tributary of
Tributary name

Videos above and below water

Water Chemistry

Water information

Water type
Fresh water
Water color
Black water
Water transparency
Low
Concentration of sediments
Low
Water temperature
27 °C
Water flow/curent
Slow

Chemical parameters

pH
4
Conductivity
30
GH
KH
Dissolved Oxygen
35 %

Aquarium information

Aquarium description

Set-up date
December, 2022
Aquarium decoration

To get as close as possible to the natural biotope, I used elongated, branched bogwood with a lot of structure and additionally alder branches. The woods were arranged in such a way that they are visible as far as possible everywhere in the viewer’s angle of vision.

In the back, I raised the substrate with gravel packs on both sides for a more natural look and also to allow aeration of the substrate. With regular weekly water changes, a natural rainy season is simulated with simple jets. Above the aquarium, plants such as:

  • Monstera deliciosa (Araceae)
  • Epipremnum aureum (Araceae)
  • Philodendron hederaceum var. hederaceum (Araceae)
  • Chamaedorea elegans (Arecaceae)

These strike their roots into the water and give an additional natural touch. The fish love it!

Aquarium equipment
  • JBL Cristalprofi E1902 Greenline 1900l/h, the 15l bucket is divided into 3 baskets filled with various ceramics as well as siporax and other biological filter material. This ensured that the tank biology is always guaranteed and a possible nitrite peak is excluded.
  • In addition, a peat reactor was installed at the outlet of the filter via bypass, among other things to buffer the pH value.
  • A high-quality titanium heating rod, which is connected to an automatic regulator, is used for heating.
Fish care

To avoid a Nitrit Peak, I used a lot of biological filter material. A large colonization area for beneficial bacteria play a very important role. In case of very high temperatures above 30°C, oxidizers are available.

The planting above the tank also serves as natural jump protection for the fish.

Fishes:

  • Apistogramma sp. D37 (Cichlidae) – 4
  • Dicrossus filamentosus (Cichlidae) – 6
  • Paracheirodon axelrodi (Characidae) – 100
Plant care
Water care

At least 1/3 of the aquarium water is replaced weekly with fresh, ultra-pure osmosis water. Humic acids in the form of foliage, alder cones and catappa tree bark are added to this. Humic acids are also added by filtering with peat.

Dimensions

Length
120 cm
Depth
50 cm
High
60 cm
Volume
359 L

Substrate in aquarium

Sand
Beige
Pebble/Gravel
Mixed
Stone
Mixed
Stone form
Roundish
Silt/Mud
None
Leaves
Many
Driftwood
Submerged terrestrial vegetation
Yes