Alternating currents?

[fishnut]

According to an article by Charles Delbeek, if you don't have a wavemaker or a SeaSwirl, then the best way to avoid laminar (constant uni-directional) flow, is to point 2 powerheads towards each other so that turbulence is created where the flows meet.

J & L has wavemakers on sale this month - each bar takes up to 3 powerheads and turns them on and off at different times. The only thing is that Hagen 802's (or any other Hagen PH) will not tolerate the constant on-off without burning up - you have to use MaxiJets with them.

I bought a used one, and it has been operating fine for me.