One wave maker device to stay far far away from is the Seaswirl. I
have a few of them laying here and all are busted., I never bought any
of the ones I have, as they were given to me by the lfs.

The hydor ocillator device takes up a lot of space IMHO in the tank,
but then again its not all t hat bad and other than routine cleaning
they do work ok., The Sea Swirl uses a small electric motor to
ocillate the oulet tubes direction. Other brands use water flow itself
as means of powering the wave maker. While its not a wave maker per
say, I plug a powerhead into a daylight recepticle and another into
nighttime recepticle on my coralife timmer so cutrrent flow changes
from time to time, and no residue or detrius accumulates form current
flow in one direction. So far it appears to work fine at eliminateing
dead spots that would other wise be there if current flowed one
direction only...

I had at one time started to work on a home brew waver maker or
current flow generator powered by water flow itself patterned after
the infamous seaswirls, but got side tracked on other things. One of
these days I'll get back to it though.


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I forgot more about ponds and koi than I'll ever know!