HELP? Is this the best i can do with this?

[F i s h y]

this is a 75 gallon "reef ready tank" (hardly) in the overflow there are 2 holes. 1 for the return that is 3/4 inch and one for the filtration that is 1 inch. Before going further let me say that I wont be drilling this tank. It isn't mine and I don't want to replace it should it break.

So what ive done is plumbed the return over the back, and i have 2 full siphon drains in the overflow. 1 that is 3/4 to use all the time and 1 that is 1 inch for emergencies. They are going to be made slightly shorter than the pic. Anything I can do better?

 

[F i s h y]

Quick bump... hoping to do water test in a bit if this is as good as it gets

 

[BullyBee]

It looks good to me. I’m no pro, but did you use a flow valve for one of the drains, or is that not needed.

 

[JDnKY]

You’re basically setting up a Herbie overflow. There are several good threads on here about them. Looks like your main drain may be a little tall and also will need a screen on it and a valve between it and the sump to control waterflow and water height in the return chamber.

 

[jgirardnrg]

Have you seen this video? It might be of some help:

 

[F i s h y]

Perfect I've updated with a valve between the main drain and the sump, and I've cut both drains shorter so the siphon doesn't draw in air.

 

[JDnKY]

Perfect I've updated with a valve between the main drain and the sump, and I've cut both drains shorter so the siphon doesn't draw in air.

Your secondary drain needs to be pretty tall as it will determine the water height in the overflow section. The lower it is the further the water has to fall thus making more noise.