I had a small yoyo loach that was on his own in a small tank with guppies and a gourami. He was always hiding, playing dead or up in a corner of the tank just looking all depressed. When i bought another tank and got a group of 5 more yoyo loaches i put him in there with them and the change in his behavior was amazing. As soon as i put him in and he joined the group he was like a little puppy when it sees its owner come home from work just all over them and doing little flips in the water. He was so happy. Loaches definitely need to be kept in groups to be happy.
