water height / weir / pump flow

[Mike-fish]

So long as your plumbing can handle the increased flow rate you should be good to go the display tank level may shift a bit. Reef central has a calculator for that stuff just the weir size might be off a bit

[mark]

simply greater the flow, greater the height of water above the weir.

run the overflow capacity calculator on reefs.org as it setup for a notched weir. Might find the increase height with flow not that much depending on how weir is setup (number of teeth etc).