I purchased some tangs on line and I received them they are tiny. How do I put them in my existing setup with 4 tangs, purple, orange striped, chocolate and golden rim. They are 4 inches or larger. The tangs I want to add are: half black, convict, and tomi. I'm afraid my existing tangs will tear them apart. I thought my new tangs would be larger. They are the size a little larger than a silver dollar. Right now the small tangs are in a 20gallon quarantine tank. I contacted one lfs and he stated he did not need any more tangs to do a trade. Right now i have a mirror on the tank because i got a copper band. Hes picking at the rocks, this is his second day. The existing tangs nip at him but they are starting to leave the Copperband alone after they fight with themselves in the mirror. Contact another lfs? This is frustrating.