i have a ocaleris (nemo) clown i cant spell it right. and a skunk clown and a sailfin in my 55 i have tried two royal grammas and they both have died and i just tried a firefish goby and it dies is ther somehting wrong i think nemo is stressing them out what can i put in there i am tired of just 3 fish i am doing corals but i want at least 4 mabye 5 if they would jsut live