Featherfin / Upside down Catfish?

[KevinZ]

Any idea? I keep them almost 16 month and yet their size still the same when i my friend give them to me. Many people & my friend said it is featherfin but i don't think featherfin stay around 3.5" Any idea?
They never swim upside down but they do stay upside down when they're hiding inside cave / driftwood

 

[Barry Tetra]

Catfish always stick upside down when in their favorite spot.

What is your tank size? They need atleast 30 gallons to grow.

 

[KevinZ]

Catfish always stick upside down when in their favorite spot.

What is your tank size? They need atleast 30 gallons to grow.

55 Gallon Cube Tank
Ph 7
Ammonia 0
Nitrite 0
Nitrate 1.0
Soft to moderate water
Diet : Shrimp Pellet (Never touch Veggies)
There's couple of the catfish not only 1