I definitely have three Garra (originally purchased online labeled as true SAE) and think I have three C. langei due to the blotch and barbels. However, I have bba and hair algae and don't think they're eating any of it. Maybe they're just spoiled by the algae and shrimp pellets I put in there for my leopard frog plecos.
I am a little confused as I have two who definately have the "blotch" on the belly. I will try to find a pic that I know I have. All of mine have "barbels". Do the barbels differ? I might have missed something in the thread?