bam Advanced/Expert level

Swamp in the Bilabong Residential Area, Bogor, Indonesia

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Indonesia, Bogor, Jawa Barat

This 210L aquarium is dedicated to Oryzias hubbsi fish, an endemic species from West Java with a conservation status of “Near Threatened”. Through this biotope aquarium, I try to observe reproduction, monitor water parameters, study the fish’s behavior in relation to other species, and explore its potential as an ornamental fish.

The aquarium is located on my terrace house with minimal sunlight exposure. Although it is a swamp pond, I provide surface water currents similar to those created by wind.

Submitted by
Margo Prasetya
Approved by
Heiko Blessin, Heok Hee Ng & Greg Martin
GPS
-6.4987221, 106.7669144
Geographical region
Southeastern Asia
Drainage Basin
Jabodetabek
River catchment
DAS Ciliwung
Water body type
Pond
Water body name
Setu Tonjong
Water body part
Marsh land
Water body course
Upper course
Water body: tributary of
Lake
Tributary name
Kali Pesanggrahan

Videos above and below water


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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
Conductivity
GH
120 mg/l
dGH
KH
80 mg/l
dKH
Dissolved Oxygen

Aquarium information

Aquarium description

Set-up date
July, 2023
Aquarium decoration

The basic construction consists of a tree branch found in the water near the biotope area, with some rocks to support the wood. Mud from the biotope area was collected and used as a base fertilizer, which was then covered by reddish-black river sand. I scattered various dry leaves that I found around the biotope over the bottom of the aquarium.

Aquarium equipment
  • External canister Fluval 207
  • Fluval Plant 6500K 46Watts
Fish care

In general, quality of the water source and the climate parameters between the aquarium and the natural environment are very similar because they are located close to each other. I focus on keeping Oryzias hubbsi; this fish appears to prefer Limnophila aquatica plants for attaching its eggs. Oryzias hubbsi is very active and likes to swim in groups and hide at night. I placed a pair of Dermogenys pusilla in the aquarium as they are safe enough for adult fish.

Oryzias hubbsi is very susceptible to white spot disease and infections, so I must maintain the cleanliness of the aquarium by changing 30% of the water once a week. I have been keeping a colony of Oryzias hubbsi for 2 years; these fish are the offspring of those I collected from the wild the previous year. Oryzias hubbsi reproduces easily, and to stimulate reproduction, I feed them live food such as microworms, bloodworms, and daphnia. Since Oryzias hubbsi is cannibalistic towards its fry, I have a separate aquarium to accommodate and raise the young fish.

Plant care

I use macro and micro fertilizers in very small doses to grow the plants. For lighting, the aquarium gets direct sunlight exposure for 2 hours (14:00-16:00), and the aquarium light is set to automatic mode from 12:00-18:00.

Water care

I change 30% of the water weekly. Once a month, I remove and clean decayed leaves and excess debris, replacing the decayed leaves with new dried leaves that have been boiled.

Dimensions

Length
100 cm
Depth
60 cm
High
40 cm
Volume
209 L

Substrate in aquarium

Sand
Black
Pebble/Gravel
Black
Stone
Mixed
Stone form
Irregular
Silt/Mud
Grey
Leaves
Many
Driftwood
Many
Submerged terrestrial vegetation
Yes

Sitography

→ Jurnal Iktiologi Indonesia
→ IUCN Red List