water height / weir / pump flow

[Baldy]

is it an internal or external overflow? is there a way to adjust the height of the teeth of the overflow?

[reeferfulton]

internal tank overflow .

no there is no real way of adjusting the teeth height. i made the glass over flow area 22.5 inches tall .
then covered that in acyrilic right to the top of the tank 25"

with teeth cut down from top to the 22.5 inch glass .

Then i added a 1/2 peice of acyrilic all the way around to effectively raise the start of the teeth to 23" ..

How do other people do this ..
I was thinking one day i would upgrade my return pump to a higher flow. but then was stumped , as this would effect my overflow into the wier

[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).