Common Name
Purple Fin Hillstream Loach. You may also see Purple Fin Sucker or Rainbow Hillstream Loach depending on the importer.
Origin and Habitat
This species is native to coastal mountain stream systems in Guangdong Province, China, and is reported as endemic to the Longjin He drainage. It is adapted to shallow riffles and runs with clear water, strong current, and very high dissolved oxygen.
Biotope and Compatible Species
A realistic biotope look is smooth stones, rounded gravel, cobble, and boulders with strong current and lots of oxygen. In the highest flow zones, the main food and cover is periphyton and biofilm coating the rocks. True plants are not typically found in its natural habitat.
| Specimen Details | Value |
|---|---|
| Scientific Name | Pseudogastromyzon laticeps |
| Size (adult) | 4-6 cm |
| Lifespan | 8-10 years |
| Water Temperature | 18-24°C |
| Water pH | 6.0-7.0 |
| Water Hardness | 2-8 dGH |
FAQ
What is the ideal water flow for this loach?
This species requires strong current and is best kept in a tank with a strong water flow, mimicking its natural habitat in mountain streams.
Can this loach be kept with other fish species?
It is best kept with other fast-swimming, non-aggressive species that can tolerate strong currents. Avoid slow-moving or bottom-dwelling fish that may compete for space or food.
What type of substrate is recommended?
Smooth stones, rounded gravel, cobble, and boulders are ideal to replicate its natural environment and provide both cover and surface for periphyton growth.
Abigail Walker –
The Purple Fin Hillstream Loach is active and curious. It thrives in a well-filtered tank with strong flow. I’ve kept it for over a year and it’s very healthy. The fish is more visible in the current zones and enjoys the rocks and biofilm.
Evan McDonald –
This loach is a great addition to a flowing stream setup. It’s not aggressive and stays near the rocks. I noticed it feeds on the biofilm, which is a natural part of the system. Needs a good filter and stable water parameters.
Dan Manning –
The fish is very active and shows interest in the water movement. I’ve paired it with a few other hillstream species and they coexist well. The tank needs to be well-maintained, but it’s a rewarding species to keep.