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Do a Google search for "Carlson Surge Device". There are lots of variations but Dr. Bruce Carlson was the first to publish his surge device in "The Reef Aquariium" vol.1 by Sprung & Delbeek.
not worth it unless you have a really really big system. The seattle aquarium had an huge surge device for their tidal pool display. If I recall right the shedd aquarium had the same also.
not worth it unless you have a really really big system. The seattle aquarium had an huge surge device for their tidal pool display. If I recall right the shedd aquarium had the same also.