To run a closed loop or not?

PPBlimpy

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I just picked up my 300G acrylic tank for my next build with a ton of extras.

Will be a mixed reef - with some SPS

Tank is 96 x 30 and 24 tall for reference with 2 center overflow boxes. approx 1 foot separating , plumbing goes out the back

Trying to come up with an idea for flow- closed loop or powerheads
With the tank came 3 NIB Leopard L160 external pumps rated at 4200 GPH
I also have an assortment of gyre style pumps i could use.

If I go closed loop
Thinking 2" input between the two overflows
2x 1.5inch return into the tank low on the back wall or maybe a 2" in the middle below the input and can reduce inside the tank to 4 x 1" lines.

any thoughts would be appreciated.

300g.jpg
 

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