[smokinreefer]

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.