<a href=showthread.php?s=&postid=10983641#post10983641 target=_blank>Originally posted</a> by KBCobra
I recently bought and setup my 120 tech (pics soon).
I cant seem to get the durso style overflows properly adjusted. THEY ARE VERY LOUD. Any tips/tricks to get this right ?
FYI: 1.5 inch water drop, constant height level in overflow box (its NOT flushing, its loud all the time).
Am I overpowering the drains ? Need bigger holes in the top ? Am I creating a vacuum in the sump ?
More about the setup:
Basement Sump (Rubbermaid 55gal)
Basement Refuge (25Gal)
Barracuda return pump
Octopus Skimmer
2x175 MH, 2x65 compacts
2x hydor 4's on wavemaker