What are your water parameters in the tank now?
This size tank wouldn't be the correct environment for the fish. Some are different varieties, Reticulated Hillstream Loach (Sewellia lineolata) also called Butterfly Loach
similar fish, Beaufortia kweichowensis is sold at many lfs
and big box fish stores.
New to FW fish? First tank in a long time or EVER??? Need some info on keeping fish?
Start here - Aquarium Advice Article
FW Favorites right now Clown Loaches, any shrimp - SW Vase Red Mangroves