Loaches are awesome fish, very playful active and great scavengers as mentioned. Agree with Midwater though, they can easily live together they won't acknowledge each other or play together. In one of my earliest tanks I had a pair of yoyos, a pair of striatas(my favorite at the time), a pair of angelicus, a pair of dwarf chain, and so on, about 12 or 14 total fish but only 2 of each, thinking it would be a fun playground community. Instead it was like a bunch of people on a busy street, the only time they acted like they even saw each other was to not run into each other, but the 2 yoys were always side by side, or following each other around, same for the 2 striata, and so on and so forth.