[Beaun]

I agree that contacting the curator from Atlantis Marine World would be beneficial, his username is JustJoe, he may be able to answer questions not many can.

Instead of running huge amounts of water in from the sea everyone once in a while, why not run a much smaller motor all the time? It's an idea to think about at least. A surge device of some sort would also be very beneficial to the system, being able to "storm" an aquarium of that size will be important to keep detritus suspended.