SCWD

[kari]

Been running one on a line from sump with a mag12 thru a chiller and up to main tank. Can't tell you how much flow lose it creates since I haven't tried it without it. In my opnion, it is a cheap, quick and easy way to create a more mixed flow.
There is a draw back though. As per a post by Evan, he found if you increase the flow rate the switching rate increases proportionaly. Too short of cycle time will be a waste of time. Therefore they will work great on smaller tanks or others only as an extra wavemaker. Check out Evan's post and see if fits your plans.
Haven't serviced mine yet. Probably should.

Rating= 8.0125

Kari