View Full Version : Bean Animal/Herbie

01-02-2018, 06:01 PM
Looking at building a Bean Animal for my 75 gallon tank. I'll probably run about a 900-1000 gph return from a sump that holds about 22 gallons. Will 1in Schedule 80 be adequate? I was thinking of putting in a 2 in emergency overflow in but it looks like 1 in will handle well over 1000 gph if I read the charts right.
Finally, is a bean animal and a herbie the same thing?


01-02-2018, 06:28 PM
a herbie uses 1 full siphon and 1 emergency. the full get's a gate valve to dial it down. just make sure the smaller of the 2 in a reef ready tank is the siphon, and make sure the emergency can handle the full pump flow.
the bean adds a durso. it's a little safer but not worth the hassle if your tank only has 2 holes. sch 80 is fine.

01-02-2018, 07:00 PM
I asked the same question when i was building my 1st reef tank. You can be successful with either method but 1 may fit your build better.

What are you starting with tank/sump drilled or not?
Do you want corner overflow or box inside/ghost?

My first build i used a 714gph pump on a 30g display/15g sump. This worked but was way too much flow.

2nd build is 90g display with 30g sump, i am using the same 714 pump and it seems like the right amount of flow.

5x water volume is what i like. Some say 10x but i think it just sweeps all the pods right out and into the display.

Dont oversize your plumbing too much, using the smallest size at full siphon restricted with a value just a touch will stay clean alot better than a 1 1/2" drain choked way back.

01-02-2018, 07:45 PM
@Marks69 thank you for your comments

@TigWeldPro, I just drilled the back, two 2 1/2" holes 3 inches each side of center. I'm going to build an over flow box and build the bean/herbie from that, possibly running my secondary line into a refugium that will sit behind the display tank and it will overflow as well into the sump after my skimmer. I was thinking I'd put a few shrimp in there with lots of rock etc so they can do their thing and the larvae can overflow into the sump and get returned to the main tank as a source of food.


01-19-2018, 05:34 PM
Both Herbie and bean animal are effective.

I used a Herbie on my last tank, it had built in overflow already so it only had 2 holes to use.

It works well, though I found on occasions requires adjustments to the gate valve to keep it quiet.

My new tank I had 3 holes put in for the drains. After more reading I'm leaning towards the bean animal this time round.
The bean animal is like the Herbie with another failsafe, the Durso.

And apparently the bean animal requires no tweaking after set up. the Durso will adjust with fluctuations keeping the system silent without tinkering.

But more importantly for me, the Durso will go full siphon should there be an issue with main drain and the tank starts to overflow. This is on-top of having the 3rd (always open) emergency drain.

I have not used a bean animal before. But from what I've read, I'm going this route.

Hope that helps.

01-20-2018, 01:59 AM
Hey D

I've been running a Herbie for 5-1/2 years and find it very quiet on a 75g running an Eheim 1262.
My first tank leaked after about 4 years. I bought an Elite Aquatics 3-drain unit for the replacement tank, but decided to plug 1 and still run a Herbie. I've heard about Bean Animal setups sometimes being noisy and never had any issues with the Herbie. Couple times a month it needs a valve tweak, but no big deal.

If you're going straight down to the sump, 1" will be enough for your main/full siphon. I run 1-1/2" about 8' with multiple 90s and find it's almost too much.
For your emerg 1-1/2" would be better than 2" if it ever needs to go into full siphon mode. 2" is fine if you're already set up for it. And it will be noisy as hell -
sucking/gurgling - so you'll know if it's running.
My first build was an Aqueon. I was stuck with running a 3/4" main and 1" emerg - over horizontal runs too - it never failed.

I would recommend you don't run your overflow box to a 'fuge. It'll need it's own valve and will mess up the main drain balance. Water will take the easiest route and you'll be playing with valves constantly fighting air/water between the 2.

Even a fluctuating level in your return section will mess up your tuning. Not having an ATO will drive you batty.
It'll take you some time to find the balance of the main drain, and it's all you want to deal with from your overflow box.

Instead, think about running the fuge from a stable section in your sump. If you run it from the box, you will lose the stability of the overflow.
And if you run it from the return pump section, you'll get DT and 'fuge fluctuations.
I tried it years ago running a 'fuge above my sump - plumbed from the return section with a separate pump and draining back to it - it drove me nuts trying to keep the fuge stable, and it messed with the DT level, so I gave up.
If you want a separate 'fuge, think about running it from and back to the section before your return pump. I feel that once this is dialed in it should remain stable enough, but you'll find out.
Best advice I can give you about it is, if you want a 'fuge, design it so you can try it plumbed 'from and to' different parts of your sump. This way you can play around until you find what works for you.
I built my first one into the sump and had to cut it out. The second one was on a shelf over the sump. That was a fail too.
As I said, I gave up :wink:

I now rely on deep crevices in my LR to allow pods/mysids/stars to thrive and it's enough for my needs. If you're looking for pod growth, consider rock piles your fish can't get into.