Here are some pictures of the sump I’m considering having made. The refugium divider will be removable to add flexibility. I set up the return area so the water will be forced past the heaters and I can put media on the egg crate above the heaters prior to it running into the return chamber.
Length - 60”
Width - 24”
Height - 16”
Water volume @ 9” - 54 gallons
Total water volume - 95 gallons
This will give me 41 gallons of extra containment which means my tank can drain over 3” before the sump overflows (I don’t plan on letting this happen as I will have a siphon break on my returns so I should be in good shape
Length - 60”
Width - 24”
Height - 16”
Water volume @ 9” - 54 gallons
Total water volume - 95 gallons
This will give me 41 gallons of extra containment which means my tank can drain over 3” before the sump overflows (I don’t plan on letting this happen as I will have a siphon break on my returns so I should be in good shape