i have a 30 gal with 70lbs of liverock and 40lbs of sand i have two clown and i have a 72 gal tank needing to set up a store out here is having a sale on clowns for 7 bucks and i would like 4 or 5 in my 72 and keep the others in the 30 i dont want to miss a deal would the newbies live with the existing ones what could i do to insure there survival thanks