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12/22/2013, 02:46 PM
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Registered Member
Join Date: Nov 2010
Posts: 14
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ID please!
So I got a piece of live rock from LFS and on the rock there is a filter type feeder. It is really cool. Occasionally it has two valves that open up on the top. Then all of a sudden the little holes shut and tightens up then releases.
It's really neat and would love to know what it is so I can keep it healthy. Any help is appreciated. Thanks 
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