circulation for 120g

[Ruth]

Not sure of the length of your 120 but I have seen wave boxes in action and IIRC they are designed to work best on a 6' tank.
If I were you I would go with the 2 X 6100 on a controller. This also gives you more options to move them around and place them exactly where you want them to give you the effect you are after. Definately get the magnetic holders for them if you decide to go this route as the hanger that come with them are a POS IMO.

[fishface]

tunze seems to have some pretty shabby instruction manuals but i did understand that you can set 2 pumps (adapter not included) to work on opposite cycles and at 2 different rates...is this correct?

also you have some really good points there Ruth, thanks for that angle.

[kwirky]

I've got three seio's in my 48x24x24 120g. a 1500, and two 1100's. My return's only a mag 7. All together that's about 2700gph of powerheads. I haven't bothered with a wave maker, as then I'd have to spend twice as much. I already get awesome water movement as it is anyways.