I have a 15 gallon tank which includes a gold ram (1 in), blue ram (1.5 in), and 4 tiger barbs (1-1.5 in). The rams stay together,the barbs chase each other but after a week i see no missing or injured fins (they don't touch the rams). I just bought a dwarf puffer and while he has left the other fish alone (much to my releif) The tiger barbs will chase him and nip his tail (althought this is seeming to slow down reasonably) wil the puffer be fine in this tank