I recently added the Saikfin Tang and thinking that there is enough difference, there should not be a conflict with the Yellow Tang I already have. I was wrong. They are about the same size, but the Yellow is more aggressive and with the tail barb, gets the best of the Sailfin. I have separated them by containing the Saikfin at one end using a plexiglass partition. Maybe with separation they might get use to each other after a week or so. Also, I known that if there are three or more Yellows together, they will not fight. If I add a second Yellow, will that be a solution or just make it worse? Thanks for any thoughts.