New over flow design..not so good at first

[bluetang]

Well, I've been pulling my hair out for the last couple days ......
I was sick and tired of looking into my 20g and seeing nothing but pumps and equipment in the tank...So I decided to take some drastic measures and tear down the tank and drill for an overflow.
After talking with Jack well over a year ago about it, I came up with an idea I thought would work.. I was wrong...It was the loudest thing I have ever heard So I thought...
You can see by way of the pics, what I have done. I drilled the back. and syliconed in a piece of black acrylic.
Being a small tank, I didnt want to put a big overflow box in there. So I glued in the piece along the back on slight angle just to create an over flow and not cut off light to the back of the tank.
I glued together a sump and added a mag9 for a return with valves to control flow.
I fired the thing up and thought I was living inside a toilet.
I thought the, somewhat durso, was going to work but it still gurgled. It turned out I drilled the top air hole to big on the duso so I put a piece of tape over it and put a couple pin holes in it until I found the right air/water flow rate and it worked alot better.
Still a bit noisy but not bad..
Any Idea's ????
[img]http://groups.msn.com/_Secure/0RwA*A8gUFtJ16py*9RQ0rxLlDgo0!plJbqE53ktv6SzKRLjVi E*FKXYSst4ZQfy9BpNb*fQ2fSJdrItofL62N4ZPY*3qifS6y2t f!fbS31Q/DSCN1765.JPG[/img]
Top view of over flow
[img]http://groups.msn.com/_Secure/0RwCnAswUD9N16py*9RQ0r!pQzzdxKzduahBvoufpPoKieLrfZ eMFgaq7WY6G50GiErKPJptJ!jzRNB*yopXhClBh!3OHb*IQeWP iL9LQmHw/DSCN1778.JPG[/img]
Sump and Tank
[img]http://groups.msn.com/_Secure/0RwCbAsUUXdF16py*9RQ0rxf1pq!33ist0YLsaAC9XhZ5Oy3Wb pA5XyfSMnGW3ghLkSOF73urEbtQuS16Z7MHAANeYaPqv0jAM1I k5igm*Pc/DSCN1771.JPG[/img]
You can hardly tell ther is a overflow from the front
[img]http://groups.msn.com/_Secure/0RwAAAMsU0NJ16py*9RQ0rxR2Iay!UknOnu474lKeFXFr3dQK6 btG0hX343cAg6uX00m6kjRdeIq69eKFQKdpJTlvWnnr7TAUA41 Xl0f2IDQ/DSCN1768.JPG[/img]