I did one very similiar. Although i used pvc instead of anything metal.
Works very we'll and haven't had any of my fish jump yet and i have a large amount of wrasse's.
Found the netting at homedepot after searching for something that was small enough but wasn't going to melt under the lights.
Works really we'll 
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180 gallon SPS Dominated reef, Reeflo Orca 200 skimmer,Proline Zeovit reactor,3 250 watt halides in lumenarc mini reflectors and 2 vortecs for flow
Numerous corals,2 purple tangs,choclate mimic tang,Foxface,Solar wrasse,male and female lubbocks wrasse,hoevens wrasse,Carpenter's Flasher Wrasse,Blue Sided Fairy Wrasse,yellow wrasse,3 Yellowstripe Anthias,True percand S.Gigantea anemone
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