my 131g FOWLR

[kien]

Originally Posted by Mr OM

I don't quite follow the W/C bypass, are you planning water changes by dumping there and overflowing into the sump?

connecting the sumps will be fine with a 2", even 1 1/2 will be OK.

Ya, that's exactly what I had in mind for the WC tank. The FOWLR would drain into the water change tank during normal operations and then overflow into a the second sump. Then when it comes time for a water change, I cut off the line going from the FOWLR into the WC tank and turn on the line that bypasses the WC tank and goes straight to the sump. Mix new salt water in the WC tank then turn valves back to normal positions.