Seio controller for seio or korilla powerheads on sale & J&L
 

http://www.jlaquatics.com/phpstore/s..._ID=wp-rszcont

THey've got some sale going on right now and it's down to $120 from $200.

I've done a bunch of reading on the controller and because it gots from 100% down to 50%, then back up and the timed interval you pick, it will work with the korilla powerheads.