i had 4 demasoni and they were in my tank for month and one day 2 were dead and the next day the other two were dead. so i went out and got 4 more and going to give it another try. when they were dead the color looked good and did not looked bloated. they in a 150 gal with 15 peacock 10 rontosas and blue dolphins with some gold nuggets and some trophs that all seem to be doing fine. the tank is we estabishd and never seems to have problems. what may have happen