RandyStacyE

Is that a DIY needle wheel in that pic?

What did you do to modify the impeller? You added a stick to it?

On my first Durso I got the flushing action. I was told that lets say your stand pipe and all fittings are 1”, your hose or plumbing leading to the sump should be larger. Don’t give up on the Durso it WILL work. Maybe you have too small of pipe/hose leading to the sump. Maybe you made too small of a Durso, etc… Usually if you slow the flow to the tank, it will stop the flushing action. Not a long term solution and certainly not a fix. I once tried splitting my returns to my sump as you did with a T; it didn’t work well for me. I only tried doing that because I was getting the flushing action that you are describing. I thought it would help the Durso – it doesn’t. In the end I upped the size of the hose from the Durso to the sump and used the Durso design shown below. I very much prefer this design; I think it takes more flow. This solved my problems: http://www.dursostandpipes.com/ After I did all of the above, my overflow is absolutely dead silent. P.S. I use a little valve on top of the durso too. They are cheap and they are excellent for adjusting the air.

Closed Loop SCWD: http://www.melevsreef.com/closedloop.html There are many ways to use you SCWD. I don't own one myself so I'm actually jealous. Some actually use the SCWD on the tanks return from the sump. It’s just from the pump to the SCWD then 2 returns coming out of the SCWD to your tank. Direct them wherever you want the alternating current to go. I’d keep them just below the surface if you don’t have a “siphon break”. If you use the design or a similar design as shown in the link above; you can sink the returns as deep as you want since it has a “siphon break”.

I think this is what you are looking for. I love Harbor Freight - it's not Craftsman, but it certainly is not eBay. Great prices! CORNER CLAMP WITH QUICK RELEASE: http://www.harborfreight.com/cpi/ctaf/Disp...temnumber=38661 3'' CORNER CLAMP: http://www.harborfreight.com/cpi/ctaf/Disp...itemnumber=1852 RIGHT ANGLE END CLAMP: http://www.harborfreight.com/cpi/ctaf/Disp...itemnumber=2712