bam medium level

Downstream of Brantas River Delta, Indonesia

Indonesia, Kediri, East Java

The theme this time is part of the corner of the Brantas River delta, where there are many biota, ranging from fish, snails, amphibian, shrimp, plants and others. The location is in East Java, Indonesia.

Berantas river is the longest and largest river in Indonesian Java.

Submitted by: MAA Rafsanjani
Approved by: Hans-Georg Evers & John Lenagan

GPS: -7.6065879, 112.1048508

Geographical region: Southeastern Asia
Drainage Basin: Brantas basin
River catchment: Brantas River Delta
Water body type: River
Water body name: Brantas
Water body part: Delta
Water body course: Lower course
Water body: tributary of: River
Tributary name: Bramata river delta

Videos above and below water

Water Chemistry

Water information

Water type: Fresh water
Water color: Mixed water
Water transparency: Medium
Concentration of sediments: Medium
Water temperature: 28 °C
Water flow/curent: Slow

Chemical parameters

pH: 6.4
Conductivity: 6
GH
KH
Dissolved Oxygen: 70 %

Aquarium information

Aquarium description

Set-up date: April 2020
Aquarium decoration: The material used in this aquarium is collected directly from the margins of the Brantas river delta such as rocks, sand, wood, plants, fish, along with the water source. the purpose of collecting raw materialsto make a copy of the underwater river brantas river delta ecosystem to resemble the design and ecosystem of the river.
Aquarium equipment: Water filtration using DIY amara filter canister 1500L/h with biological media. Assisted by amara 1000L/h for the effects of heavy current. While the lighting used is 70 Watts led 6500k smd strip.
Fish care: Food and medicine.
Plant care: Fertilizer application.
Water care: Once a week water change.
In my aquarium, I used a lot of drifting trees, branches and dead leaves to simulate the accumulation of trees and branches along the beach and river bank, and a lot of light background color to simulate the beach color of habitat. I used one external filters and one pre-filters for both physical filtration and nitrifying bacteria cultivation. I use pure water and a small amount of domestic water to mix to ensure the balance of GH/TDS values, because there are a lot of driftwood, plants and dead leaves in the tank, they can control the fluctuation of pH values very well. It’s easy for me to control algae growth by changing water and controlling light time. In daily maintenance, only changing water and cleaning the glass of fish tank.

Dimensions

Length: 100 cm
Depth: 40 cm
High: 40 cm
Volume: 194 L

Substrate in aquarium

Sand: Black
Pebble/Gravel: Black
Stone: Black
Stone form: Roundish
Silt/Mud: Black
Leaves: Many
Driftwood: Few
Submerged terrestrial vegetation: Yes

Bibliography

1996 - The Ecology of Java and Bali. Hong Kong: Periplus Editions by Whitten, T; Soeriaatmadja, R. E.; Suraya A. A
2004 - "Brantas River Basin Case Study, Indonesia" (pdf). Background Paper by Ramu, Kikkeri
2007 - Updated world map of the Köppen-Geiger climate classification". Hydrology and Earth System Sciences. by Peel, M C; Finlayson, B L; McMahon, T A

Sitography

→ BKIPM
→ UNAIR

Comment by the expert

Hans-Georg Evers: A close copy of nature with all natural and original decoration. Aquarium fish information missing. Is this Redigobius or Rhinogobius?

John Lenagan: Again because the images were blurred (lifted from video) the composed video stream noting numerous macro captures with limitations through depth of field, reduced the overall experience of the compositional. I was not able to ascertain the overall composition. Hence knowledge transfer for others to be able to create such a Biotope was limited. The effective niche realism within a medium sized 1000mm tank was of a very high quality and appeared almost real and insitu at times. The use of the local material to create riparian nooks and cranys including root massing and the subtle lighting as modelled well reflected the environments found in these small stream habitats. The macro video sequences with natural sounds were well composed showing numerous intimate encounters within the Biotope including a range of the native fish and invertebrates. I am still uncertain as to how many fish reside in this Biotope and how long this Biotope could be maintained given its Bio Mass within it, the catfish sequence did indicate some stress – not sure why. The tank water quality while realistic would have presented better if it had been filtered for fines and the glass throughly cleaned for the shoot.