Yellow Fin Hillstream (Pseudogastromyzon changtingensis)
The Yellow Fin Hillstream is a small, peaceful freshwater fish native to China’s mountain streams. It features a distinctive yellow fin that extends from the dorsal area, giving it a unique appearance. This species thrives in well-oxygenated, slow-moving waters with clean, natural substrates.
Key Features
- Native to mountain streams in southern China
- Small size, typically 3–4 cm in length
- Distinctive yellow fin for easy identification
- Peaceful and community-friendly behavior
- Requires clean, well-oxygenated water
Water Conditions
| Parameter | Range |
|---|---|
| Temperature | 18–24°C |
| PH | 6.0–7.5 |
| Hardness | 1–10 dGH |
| Water Flow | Low to moderate |
FAQ
What is the ideal tank size for keeping Yellow Fin Hillstream?
A minimum of 20 gallons is recommended to provide adequate space and water stability for this species.
Can Yellow Fin Hillstream be kept with other fish species?
Yes, it is peaceful and can coexist with similarly sized, non-aggressive community fish such as tetras and rasboras.
How often should the water be changed?
Perform 20–30% water changes every 4–6 weeks to maintain water quality and stability.


James Lewis –
The fish arrived healthy and active. It has adapted well to my 30-gallon tank with gentle flow. The yellow fin stands out and adds a nice touch to the community. Easy to care for and very peaceful.
Elizabeth Abraham –
I’ve had this fish for two months now. It’s very active but not aggressive. The water parameters are stable, and it seems to thrive in the natural setup with driftwood and fine sand.
Thomas Peake –
Perfect for a small aquarium. The fish is vibrant and stays calm even with other species. I appreciate the clear instructions and accurate description. A great addition to a peaceful tank.