i have a 125gal peaceful tank. i had 1 kissing gourami because that's all the lfs had. he never bothered any of my other fish. yesterday i bought a 2nd kissing gourami about same size of 4". now the original gourami can't stop chasing and pecking at the new one. i am considering taking the new or old gourami back to lfs, or isolating the old gourami in a vacant 10gal tank for about a week, then putting him back in. anybody have any advice?