I’m guessing the 90 gallon since the 240 will not have anything preying on pods initially. 3. Would our 4′ lighting be adequate lighting for the new 6′ tank? The darker edges of the tank could house coral specimens requiring less direct light. 4. Can all fish, remaining live rock, and inverts then be moved at one time or should this be spread out over several days/weeks? The fish all get along very well and I am worried that in moving, the two tangs may develop aggression toward each other. The two tangs are inseparable in the 90 and we want that to continue so I was worried to not move them simultaneously.