04/19/2007, 03:57 PM
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Humble Reefkeeper
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Join Date: Apr 2000
Location: Wakefield, MA, USA
Posts: 1,565
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12 Volts. Marine batteries can be purchased at an autoparts store. I purchased my system from Jehmco:
http://www.jehmco.com/PRODUCTS_/HARD...up_system.html
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