Clown Loaches get along great with tiger barbs. In my experience I've even seen them swimming with them as one of their own. A very entertaining combination for sure.
Yes, they school together.
I've always wanted to see a large school of tiger barbs. I'm thinking 30 or 35 of them would be awesome in a 50 gallon tank.
I will see if I can dig up an old photo.
~30 Rummy-nose Tetras, ~30 Balloon Lamp-eye Tetras, 2 Bristlenose Plecos, 4 German Blue Rams, 1 Rainbow Shark ~15 Amano Shrimp, 8 Roseline Sharks, 3 Clown Loaches, 2 SAEs