Drain question

[rareform]

I have use the search function to find my answer and I'm surprised I could not find it here.
I have a 150 gallon tank with a 1-1/2" drain and two 3/4" returns. My goal is to run about 1000 gallons per hour. I have done my wet test and can not get the drain quiet.
I've tried the Durso and the stockman drain.
So my thought is maybe use all 3 as drains like the bean animal but how would that work with two 3/4" and one 1-1/2" which would be the full siphon? I would prefer to keep it the way it was designed for but not sure how to get it quiet.
I thought I had it with the stockman but after a few days it would gargle ever few minutes.
Any thoughts would be greatly appreciated.

 

[OurCoralReef]

Maybe put a gate valve on the bottom of the drain as to always have water in the pipe

 

[mcgyvr]

You are simply trying to flow too much water through it..
You really only need like 500gph flowing through it...
IF adjustable pump dial it down.. If not put a valve on the output and throttle it back..
Dial down until you can get it quiet with the Durso setup..

You really can't achieve a proper bean setup or anything else with the holes how they are..
Slow the flow..

 

[homer1475]

You could certainly do a herbie setup with those hole sizes. You would make the 1 1/2 as your emergency, and one of the 3/4 as your siphon. Then just use the third 3/4 hole as a return with a T to split it to either side of the tank.


A Herbie is better as you have an emergency in case the siphon plugs up, you won't have a flood. With a single pipe, one snail down the pipe and you will have a flood, or a burned up return pump.



Out of curiosity, is this a center overflow tower style tank?

 

[rareform]

The overflow is in the back center. Today I went to my local reef store and they had a Maggie drain so I bought it. He was using it on all of the tanks so I figured I’ll give that a shot.