bean animal owerflow - The Planted Tank Forum
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post #1 of 8 (permalink) Old 06-01-2020, 05:02 PM Thread Starter
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bean animal owerflow

No ( when start with plumbing ) see that only have 2 hole for drain and the 3 is for return….
Is is possible to do bean animal owerflow with this 2 pipes?
How important is emergency pipe?

Can i put ( if BA can not work with 2 pipe) return pipe for emergency ?
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post #2 of 8 (permalink) Old 06-05-2020, 04:31 PM
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Originally Posted by Tomislav Mirt View Post
No ( when start with plumbing ) see that only have 2 hole for drain and the 3 is for return….
Is is possible to do bean animal owerflow with this 2 pipes?
How important is emergency pipe?

Can i put ( if BA can not work with 2 pipe) return pipe for emergency ?
I'd say that you can either use the return and plumb that over the top of the tank, or use the 2 drains to run a Herbie overflow.

“Science, my lad, is made up of mistakes, but they are mistakes which it is useful to make, because they lead little by little to the truth.” -Jules Verne
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post #3 of 8 (permalink) Old 06-05-2020, 05:43 PM
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Bean Animal is defined by having 3 drains (full siphon, trickle, emergency). Without that it can't be a bean animal. For 2 hole drains you use a Herbie (full siphon, trickle/emergency).
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post #4 of 8 (permalink) Old 06-06-2020, 03:34 PM
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I chose a herbie drain, now I've seen it working all a bean animal does is give you two emergency drains instead of one. As long as you throttle your full syphon at least a bit I don't see the need for a third drain but I'm no expert on overflows.


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post #5 of 8 (permalink) Old 06-06-2020, 05:17 PM
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I chose a herbie drain, now I've seen it working all a bean animal does is give you two emergency drains instead of one. As long as you throttle your full syphon at least a bit I don't see the need for a third drain but I'm no expert on overflows.
I converted the megaflow overflows to Herbie setups by running the return over the sides and I couldn't be happier with it.

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post #6 of 8 (permalink) Old 06-06-2020, 08:00 PM
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I chose a herbie drain, now I've seen it working all a bean animal does is give you two emergency drains instead of one. As long as you throttle your full syphon at least a bit I don't see the need for a third drain but I'm no expert on overflows.
Bean Animal exists because in a very high flow environment like a reef tank the single emergency in a Herbie can be overwhelmed.

The emergency in a herbie has a super slight trickle. The second drain on a bean animal is more like a half siphon so it allows for considerably more flow and the real emergency is bone dry and only used on a real emergency.
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post #7 of 8 (permalink) Old 06-11-2020, 08:17 AM Thread Starter
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Thanks for answers….
Maybe i ask wrong question

I see that BA is silent and that is why i want him.

Is herbie also silent?
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post #8 of 8 (permalink) Old 06-11-2020, 02:26 PM
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Thanks for answers….
Maybe i ask wrong question

I see that BA is silent and that is why i want him.

Is herbie also silent?
Yes it is, you just have to make sure that the vertical difference of the two pipes is around 6" or more. If you have it set up correctly, in my experience, it is easy to tune and runs silent.

Here's a good example.

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