my 131g FOWLR

[golf nut]

Originally Posted by kien

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.

So you use persay dirty water to force clean water into the system?