55 gallon sump with baffle and return chamber. Bulkheads for draining and outlets.
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http://images.craigslist.org/0101050104030103082008072774a92c3247a5cfd7c1000d55.jpg
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http://images.craigslist.org/0101050104030103082008072774a92c3247a5cfd7c1000d55.jpg