I just bought a pair of weather loaches, there both small yet, Id say about four inches or so. The bigger one is dark colored and the light colored one is just a whisker hair smaller. Well the darker one has a one spot on its nose, It looks like a scuff but im worried it could possibly be ick. heres some pics of both of them. one pic showed up as link, its down there though, its a pic of the light colored loach



