Ghost Overflow, Which One?

[Pistol]

I am planning an 84x30x24 240gal inwall mixed reef, help me decide which overflow.
I am going with Modular Marine and my choices are
3600GPH, 36"weir https://modularmarine.com/collectio...-low-profile-overflow-box-with-removable-weir
3000GPH, 30" weir https://modularmarine.com/collectio...-low-profile-overflow-box-with-removable-weir
2400GPH, 24" weirhttps://modularmarine.com/collectio...-low-profile-overflow-box-with-removable-weir
Or possibly 2 x 1200GPH or 2 x 1600GPH But I doubt I would do 2.
Just looking for some thoughts, opinions, experiences.

 

[Matt1997]

Really 84x30x24? Sounds nice...

 

[Matt1997]

Id go with the reefsavy one personally. Whatever one you choose if you order it to my address I can add it onto the tank no problem?

 

[Matt1997]

Out of those 3 option I would do 2 1200/1600 gph. one on each side.

 

[Pistol]

Id go with the reefsavy one personally. Whatever one you choose if you order it to my address I can add it onto the tank no problem?

Why reefsavy?
I like the fact that the internal box is removable on the modular marine

 

[shamous113]

I would suggest going with single 3600gph units. its easier to run less flow thru a unit then trying to run it at it's max and Balancing 2 bean animal overflows is going to be a pain in the ass. here's a neat little calculator that will show that the maximum flow rate at full siphon for your return plumbing.

 

[Matt1997]

It won’t be difficult to balance them. Overflows are based off of water input so very simple to control the flow through an overflow. Add a ball valve onto all bulkheads. I think the reef savy 2000 looks sleek

 

[Pistol]

I would suggest going with single 3600gph units. its easier to run less flow thru a unit then trying to run it at it's max and Balancing 2 bean animal overflows is going to be a pain in the ass. here's a neat little calculator that will show that the maximum flow rate at full siphon for your return plumbing.

I'm not finding the calculator

 

[shamous113]

I'm not finding the calculator

it requires adobe flash to run its about 3/4 of the way down the page. if you run the calculations with 3' of head height and 1.5"dia pipe the drain pipe can handle over 4500gph. A external overflow box it is restricted by the hole size from the tank to the box because its not running a siphon at that point.

And with 1" dia pipe.

 

[Pistol]

it requires adobe flash to run its about 3/4 of the way down the page. if you run the calculations with 3' of head height and 1.5"dia pipe the drain pipe can handle over 4500gph. A external overflow box it is restricted by the hole size from the tank to the box because its not running a siphon at that point. View attachment 16294
And with 1" dia pipe.

View attachment 16295

That's great, thanks

 

[shamous113]

Is your sump going to be under the tank or are you doing a basement sump?

 

[Salty Cracker]

I have dual ghosts, no idea the brand name, but they are relatively easy to set up for silent running...

 

[Pistol]

Is your sump going to be under the tank or are you doing a basement sump?

Still on the fence on that one but leaning towards under sump

 

[Pistol]

I have dual ghosts, no idea the brand name, but they are relatively easy to set up for silent running...

Are they Bean Animals? any pics?

 

[Salty Cracker]

I went with two straight pipes, one dry, one on drains with gate valves on each side. I -think- they are all 1" to keep the system narrow against the wall. By the way they leak, I think Garry built them himself

That said, they work fine, I rarely have to adjust the flow to either side once they're set, if they make noise then something needs attention (socks/screens etc).