Igarapé Cajari, a tributary of Rio Caurés, Amazonas, Brazil

Brief Tank Description

75 Gallon Blackwater Biotope tank

What Filter System Do You Use?

External filter Fluval 306, Eheim 2217.

What Heating System Do You Use?

Eheim Jager 300 Watt

What Lighting System Do You Use?

LED spotlight 5W*3 4500K

What Fish Do You Have In Your Tank?

Hemigrammus Bleheri X 25, Paracheirodon Axelrodi X 25, Apistogramma Mendezi X 5, Nannostomus sp.X 25, Corydoras Adolfoi X 10

What Plants Do You Have In Your Tank?

What Makes Your Tank Unique?

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 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.

What Do You Like Best About Your Tank?

Natural environment


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