So I hooked up my dual Durso standpipes and I didn't like the results at all. So I looked around for ideas on making the overflow quiet and I came across the "Bean Animal" Silent and Safe Overflow method on Reef Central. I was actually very happy with the results and I created the following video with the test results.
Since I was rebuilding my tank I decided to do some plumbing changes. The biggest change was taking the tank from a single drain to dual drains. The existing overflow had a single drain but I also had a glass lined area used for a return line so that nothing had to run behind the tank. I don't use the return line and I wanted to have a second drain so I planned to cut out the glass panels so that I could put in another bulkhead and drain line. ...