Purple Fin Sucker
A small hillstream loach with a broad flattened body and purple-flushed fins, grazing algae from rock surfaces in fast water. Peaceful and industrious.
Feeding
Grazes biofilm and algae. Supplement with algae wafers and blanched vegetables.
Compatibility
Peaceful with other species, though males squabble over grazing territory. Keep in a group with plenty of smooth rock surface. Suits cool, high-flow setups.
Behaviour and personality
Clings to glass and rock in the current, working surfaces constantly.
Before you buy
| Requirements | Details |
|---|---|
| Water flow | Strong flow |
| Water temperature | Cooler water |
| Oxygen level | High oxygen |
| Tank setup | Established tank with algae |
FAQ
What kind of water conditions does the Purple Fin Sucker need?
It requires cool water, strong water flow, and high oxygen levels. It thrives in established tanks with a steady current and algae for grazing.
Can it be kept with other fish?
Yes, it is generally peaceful with other species. However, males may fight over grazing areas, so it’s best to keep them in groups with plenty of smooth rock surfaces.
What should I feed it?
It naturally grazes on biofilm and algae. Supplement its diet with algae wafers and blanched vegetables.

Ava Roberts –
The Purple Fin Sucker is active and adds a lot of interest to my high-flow tank. It spends most of its time clinging to the rocks and grazing on algae. I feed it algae wafers twice a week and it seems to enjoy them. The fish is peaceful and doesn’t stress other tank mates.
Diane Nash –
I kept a group of three Purple Fin Suckers in a well-established tank with strong flow. They’re very hardworking and keep the rocks clean. Males do show some minor territorial behavior, but it’s manageable with enough space and rock surfaces.
Ava Vance –
After a few weeks, the algae in my tank reduced significantly thanks to these fish. They’re active, clean, and don’t require much attention. Only feed them algae wafers and blanched spinach occasionally.