Question on Hillstream Loaches

1.) Can anyone confirm if they’re the same type? They were displayed in the same aquarium tagged as hillstream loach.

2.) If not, should I add more to have 3 of each type or this would be fine?

This is a 1 month old unheated 25gallon tank, with some plants and red and blue shrimps.

This is the first time in 1 month I’ve seen the three of them together, but is short lived.

The two always hang out together and is anything but shy. The odd one likes hiding in the rocks more.

Thanks in advance.

1.) Can anyone confirm if they’re the same type? They were displayed in the same aquarium tagged as hillstream loach.

2.) If not, should I add more to have 3 of each type or this would be fine?

This is a 1 month old unheated 25gallon tank, with some plants and red and blue shrimps.

This is the first time in 1 month I’ve seen the three of them together, but is short lived.

The two always hang out together and is anything but shy. The odd one likes hiding in the rocks more.

Thanks in advance.