A lot of people have been getting the Jebao WP or newer RW series of powerhead. They are controllable, silent and fairly inexpensive. The new Maxspect Gyre Generator is set to be released soon and if they prove to be what they claim I'll be replacing my 3 older koralias power heads for one of these. I had a Jebao WP-25 in a 29g reef tank but ended up selling it because all but the lowest settings were too much for the tank.
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