bam Demanding level

Mountain Stream, Hainan, China

Sponsored by

China, Hainan, Hainan

This 38L tank replicates a small mountain streambank pool in Hainan. Inside of the aquarium you can find a small school of 7 white cloud mountain minnows  Tanichthys albonubes darting in the current among smooth river rocks. Along the bank you can find maidenhair fern Adiantum sp. and some small umbrella trees Schefflera arboricola.

Although the golden strain is not strictly a native coloration, it was much easier to find and I felt that it was okay taking artistic liberty as I feel they pop against the background and rockwork.

What I really tried to do differently with this tank is the technological part. The lighting, pumps, and rain are set to pull and adapt to real time weather data in Hainan. Meaning that the lighting, weather, and water level will change on a daily and seasonal basis.

Submitted by
David Taylor
Approved by
Sun Kai & Zhou Hang
Geographical region
Eastern Asia
Drainage Basin
South China Sea
River catchment
Nandu River
Water body type
Pool
Water body name
Nandu River Tributary
Water body part
Pool
Water body course
Upper course
Water body: tributary of
Stream
Tributary name
Nandu River

Videos above and below water


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Water Chemistry

Water information

Water type
fresh-water
Water color
Clear water
Water transparency
High
Concentration of sediments
Low
Water temperature
68ºF or 20ºC °C
Water flow/curent
Slow

Chemical parameters

pH
8.2
Conductivity
GH
dGH
KH
dKH
Dissolved Oxygen

Aquarium information

Aquarium description

Set-up date
January
Aquarium decoration

The hardscape of this tank consists mainly of natural rocks collected from a stream near my home in Utah, USA. They are of similar color and makeup to the rocks found in Hainan. Rocks are stacked and built up to look like a cross section of a narrow pool in a stream with banks on either side and water flowing over rocks into the pool, flowing from left to right.

Plants emerge from the bank in a bunch on the right side, adding perspective and scale. The substrate consists of fine sand and gravel from a nearby fish store, matching the natural color of the rocks and appearing to have been pushed into the deeper section of the stream by the flow.

A bright foreground and dark, narrower background adds depth and increased perspective. There is a vinyl hose attached to the lid with holes drilled to replicate natural rain drops, this pump is programmed to rain in short or long bursts depending on the real time rain intensity in Hainan.

The light is a smart bulb that is also programmed to adapt to real time weather data in Hainan including sunrise and sunset times, cloudy weather, rain, or thunderstorms.

Aquarium equipment
  • Filtration: Topfin 29 gal HOB filter, emersed plants, thick substrate
  • Pump: 90 GPH mini submersible pump
  • Lighting: Kasa Smart Bulb KL125
  • Computing: Raspberry Pi 3.0 B
Fish care

The fish are given many different areas. A faster flowing area in the front allowing them to dance in the flow, a slow flow and darker area in the back middle where they can rest and hide, roots along the streambank on the right side and upper corner giving them areas to hide, sleep, and breed. The fish are fed twice a day with high quality fish food.

A 20% water change is done every 14 days to keep the water clear and clean. Fish are occasionally fed frozen or live food to stimulate natural behavior and breeding.

Fish list:

  • Tanichthys albonubes, Golden variant (Tanichthyidae)
Plant care

The plants in this tank (maidenhair fern and umbrella tree) do not require any special care. They are growing in emersed form, with their roots in the substrate and growing into the tank.

Wetland plant list:

  • Schefflera arboricola (Araliaceae)
  • Adiantum sp. (Pteridaceae)
Water care

The water is tested before every water change, done every 14 days at 20%. Water that is replaced is slightly colder to replicate the natural flow of stream water. The front glass is scraped with every water change and the substrate is stirred monthly. Water is topped off frequently to adapt for evaporation and replicate natural water level.

Dimensions

Length
50.8 cm
Depth
25.4 cm
High
30.48 cm
Volume
37.85 L

Substrate in aquarium

Sand
Pebble/Gravel
Stone
Stone form
Silt/Mud
Leaves
Driftwood
Submerged terrestrial vegetation