68 Gallon Rimless Reef Build

[zhasan]

Originally Posted by gregzz4

Are you referring to baffle overflows, or total volume flooding ?

Depending on what your gph over the baffle will be, you potentially could go almost right to the trim
A 12" wide baffle can handle around 800gph and have a film of less than 1/2" of water

My baffles are almost 18" wide
I only left myself 1/4" from my highest baffle to the underside of the plastic trim
When my el-cheapo socks plugged up, the baffle still handled the flow from both my Eheim 1262 return pump (8-900gph), Compact 2000 (225gph) and 2 MJ600s through reactors

Originally Posted by gregzz4

If I misunderstood, and you are worried about overflowing of total system volume during power off, I'd go with a bigger return area as that's where all the extra water is going to end up
Your current design only allows for about 3.6g (if it's a 12" wide tank)

Greg you're right! I was worried about the total system overflowing during power off because it happens in my area often for some odd reason.

What I don't know about is how much water will actually be in the return area constantly when the system is running... is there a way for me to figure that out before setting everything up?

I really like how you did your sump. Very well planned out! unfortunately I don't have a lot of realestate to play with here.

If I have to increase my return chamber size the only way thats possible is if I reduce the size of the refugium. I don't know what the best or at least minimum size of refugium I'd need on my system. Or is it best to go as big as you can?