I had originally planned to order my 215 with a 5 hole closed loop system. One intake and 4 returns using 2 SCWD's. The SCWD's fit 3/4 hose so it should be pretty easy to use them.

I ultimately decided on no closed loop since my tank will be up against a wall and if a bulkhead were to start leaking it would be inaccessible. I guess having my 140 leak has made me leak shy. I think I will give the Wave2K's a try. www.wave2k.com