overflow for peninsula
 

I'd like to do an overflow like this:

http://www.nano-reef.com/forums/lofi...p/t215859.html

except the top 2 returns would go through the overflow box and have antisyphon holes. Would there be an issue with the bottom 2 returns back siphoning? Anyway to tweak it? The tank will be 7x2x2 peninsula. 1.5" return split into 4 1" or 3/4" lines powered by a barracuda or hammerhead with 14ft head height.

The lower return will drain the tank with the pump off to the top of the Squid, then you'll get the siphon break. Way around would be to have the lower returns on closed loop.

Check kien's build for a peninsula

Thanks Mark that's what I needed to know.