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Old 01-04-2013, 08:52 PM   #12
Algae Grower
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Join Date: Aug 2012
Location: Portland, OR
Posts: 117

HOB breeder boxes aren't quite secure enough to keep shrimplets from getting back in to the main tank. I've even had guppy fry make it through the grate, and any time I put foam there it just makes the return weir overflow down the back of the tank. They can keep juvy/adults out of the flow but babies are very very tricksy.
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