This is the one that I purchased. It took Doug from RC a couple of times to convince me.....and I am a die-hard believer now!!! I will not be without one ever again!!.........and I cannot believe why I was without one so long!
One of the most understated, hardest working piece of mechanical gizmo that you can have.
http://www.jlaquatics.com/phpstore/s...D=tz-osmolator