Frag table depth.

[Proteus]

I'm in the process of making a frag table.
I want it to be AIO. Would like to keep "sump" chamber 10/12 inches

Curious what depth people have there frag tables at.

[spit.fire]

My display tank / frag tank is 12" tall, with a smaller footprint than mine I'd say 6" would be perfect, I went 12 so I could keep colonies in there and have some rock work

Only reason I'd say with a smaller footprint is because with 6' x30" it's hard to get good flow throughout the tank without closed loop or power heads everywhere