for ppl that like to read:
http://reefkeeping.com/issues/2003-1...ture/index.php
ppl use ozone to increase it typically 
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Clownfish Collection: Normal Ocellaris, Black Ocellaris, Stubby Ocellaris, Tequillia Sunrise Ocellaris,
Red Sea, Black Saddleback, Brown Camel, Orange Fin, Melanistic Clarkii, Common Clarkii, True Percula, True Picassco, Pink Skunk, Orange Skunk, Maldives Clown, TRUE Sebae clown, Akin Clown, Gold Striped Maroon, White Striped Maroon, Latezonatus
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