Tunze 6020
 

I'm considering getting one of these and wondered if anyone has one and what they think. I think the 6040 is the same pump but has a controller, but not sure.

I'm curious about these too, but the 6020 is only 660 gph which is really only suitable for a small, low flow tank. The 6040 is 1200 gph, but is 3x the price. I haven't used one yet, but I think unless you really need a low-profile pump for the particular space you want to put it, you can achieve the same thing using one of their regular Nanostream pumps. It seems like a really niche pump to me. Do you have a particular place you want to put it? I want to put two of them blowing down my back wall, and with the cord coming out the bottom of the pump, if I position them "upside down" the cord would go straight up and be tidy. I'm on the fence like you.

That's what I want to do with it along the back wall behind the rock work.
According to what I googled the 20&40 are basically the same pump and the 40 only comes with the controller.

The 6040 comes with a bigger magnet, uses more power, pushes twice as much water, has a longer cord, and comes with a controller. Note that the 6020 is only rated for 3/8" glass.

http://reefbuilders.com/files/2014/0...efbuilders.jpg

But otherwise the same. :)

tunze 6040
 

Just got a Tunze 6040 today from J&L I wanted to be able to control the flow and have options for a wave maker, this is an awesome little 12vdc pump, glad I got the controllable one, works great! :smile:

Awesome!