Good adjustable flow pump?

Anyone have experience with these Hydors

[ame="http://www.amazon.com/Hydor-Seltz-L20-Purpose-Pump/dp/B0002GTRWE"]Amazon.com: Hydor Seltz L20 All Purpose Pump 11W 185 gph: Kitchen & Dining[/ame]
 
Look into a small Rio pump. They come with redtrictor valves that you can adjust down. I have a little Rio 4 H on my carbon reactor, works great.
 
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