I like the wave effect myself, it does create a nice back and forth whooshing effect that is neat to watch especially with tentacly things like anemones or softies, and seems to promote good polyp extension overall.
But the box takes a fair chunk-o-space in the tank.
Seen the waves produced by Vortechs and it's impressive that they can do that without the aid of a box to displace water in and out of (like how the Tunzes do it). Not sure but I think you need more than one though, to pull it off correctly.
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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