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Blackwater biotope aquarium from Igarapé Cajari

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The roots and branches I have used are branch woods. I have used 2 types of woods, couple of them are thicker branch woods & couple of them are thinner woods. These woods I used in my previous setups & those are with me for around 7-8 years. So, these are well seasoned.

The leaves I have used are Indian almond leaves which is abundant here. There are some broken leaves which makes a messy layer over ground level as we can generally see in this region. The substrate is a mixture of JBL river sand & yellow sand.

There are some branches which are fallen from top, as we can see in the amazon rainforest. Also, to replicate ‘tea colour’ water in this Igarape Cajari area, Indian almond leaves do the job of making tea coloured ‘blackwater’. Apart from that, during water change I use Natural Humin which is a product of ‘Discusfood’ company.

Interesting part of this aquarium is, in this tank Corydoras adolfoi lays eggs couple of times.

Submitted by
Achintya Shankar Adhikari
Approved by
Heiko Blessin & Nathan K. Lujan
Geographical region
South America
Drainage Basin
River catchment
Rio Caurés
Water body type
River
Water body name
Igarapé Cajari
Water body part
Water body course
Water body: tributary of
Tributary name
Rio Caurés

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
27 °C
Water flow/curent
Slow

Chemical parameters

pH
4.5
Conductivity
GH
KH
2 mg/l
Dissolved Oxygen

Aquarium information

Aquarium description

Set-up date
June 2019
Aquarium decoration

The roots and branches I have used are branch woods. I have used 2 types of woods, couple of them are thicker branch woods & couple of them are thinner woods. These woods I used in my previous setups & those are with me for around 7-8 years. So, these are well seasoned. The leaves I have used are Indian almond leaves which is abundant here. There are some broken leaves which makes a messy layer over ground level as we can generally see in this region. The substrate is a mixture of JBL river sand & yellow sand.

There are some branches which are fallen from top, as we can see in the amazon rainforest. Also, to replicate ‘tea colour’ water in this Igarape Cajari area, Indian almond leaves do the job of making tea coloured ‘blackwater’. Apart from that, during water change I use Natural Humin which is a product of ‘Discusfood’ company.

Interesting part of this aquarium is, in this tank Corydoras adolfoi lays eggs couple of times. But I have a hard luck to successful hatch. Also, in my aquarium I have paired Nannostomus Eques. I have this aquarium for more than 1.5 years & most of the fishes are from the beginning.
Igarape Cajari which is a tributary of Rio Caurés doesn’t have fast flowing water. So, to replicate that water flow I deliberately keep low flow of water in my aquarium.

Aquarium equipment

External filter Fluval 306, Eheim 2217, LED spotlight 5W*3 4500K

Fish care
Plant care

NA

Water care

To replicate ‘tea colour’ water in this Igarape Cajari area, Indian almond leaves do the job of making tea coloured ‘blackwater’. Apart from that, during water change I use Natural Humin which is a product of ‘Discusfood’ company.

Dimensions

Length
120 cm
Depth
45 cm
High
45 cm
Volume
270 L

Substrate in aquarium

Sand
Reddish
Pebble/Gravel
Stone
Stone form
Silt/Mud
Leaves
Adundant
Driftwood
Many
Submerged terrestrial vegetation
No