Bottle trap as Levi said but put a mirror in the back too. May take a few days but worked for me. Also had to cut the threads off the bottle top to make it less intimidating to go in.
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Red Coral Online Store 
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45 Gallon Cube with 10 Gallon Sump, Lighting 8 bulb T5, Vertex IN 80 Skimmer
-2 Occelaris Clowns, Engineer Goby, RBTA, Peppermint Shrimp
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