Sump\ Baffle question

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Im setting up a 40 breeder to handle 2 tanks (120 + 57 ) = Total volume of 177
From my calculation I lose about 14 gallon of water from my 120 (inclusvie of Skimmer, Reactors and Overflow), and im estimating half as the loss for the 57 gallon so that brings overflow of about 20 gallons (14 from 120 + 7 from 57)
The breeder has a height of 18 inches so that makes each inch approx 2.22 gallons. So that means that i need to leave half of the tank empty for overflow purposes . I also need about 9 inches of water to operate the skimmer effectively.

So what does that transalate to in terms of baffles? I would like to run a deep refugium / frag area in the sump .....


What is the highest baffle i can run to get a deep refugium?
According to my calculations the highest baffle can only be 9 inches (half of the 40 breeder height)? From speaking with jgraz and Kschwesr, the baffles would have to be.

From left to right (overflow to return )
9, 10, 8, 9... Is this correct? and if so does that mean that refugium will only be 9 inches deep?

The requred cutout of the sump width-wise is 12 inches for the skimmer section, 19 inches for the refuge and 5 for the return. Any comments and checking of my calculations would be greatly apprecited

THanks and Happy holidays​
 
Im setting up a 40 breeder to handle 2 tanks (120 + 57 ) = Total volume of 177
From my calculation I lose about 14 gallon of water from my 120 (inclusvie of Skimmer, Reactors and Overflow), and im estimating half as the loss for the 57 gallon so that brings overflow of about 20 gallons (14 from 120 + 7 from 57)
The breeder has a height of 18 inches so that makes each inch approx 2.22 gallons. So that means that i need to leave half of the tank empty for overflow purposes . I also need about 9 inches of water to operate the skimmer effectively.

So what does that transalate to in terms of baffles? I would like to run a deep refugium / frag area in the sump .....


What is the highest baffle i can run to get a deep refugium?
According to my calculations the highest baffle can only be 9 inches (half of the 40 breeder height)? From speaking with jgraz and Kschwesr, the baffles would have to be.

From left to right (overflow to return )
9, 10, 8, 9... Is this correct? and if so does that mean that refugium will only be 9 inches deep?

The requred cutout of the sump width-wise is 12 inches for the skimmer section, 19 inches for the refuge and 5 for the return. Any comments and checking of my calculations would be greatly apprecited

THanks and Happy holidays​

Seems like such a consistent height would demand an auto top off system

Sent from my DROID RAZR MAXX HD
 
I do have a jb that is able to maintain that
 
When I built my 30G sump 9 years ago, I made the refugium baffle almost full height and have it overflowing into the center or skimmer section.

sump5-1.jpg


From there it goes through an over-under-over baffle set up that keeps the water level around 8-9" high and into the return section.
 

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