SCUBAJENNIFER:Holy Crap...I've never seen a 10 gal reef tank...How much live rock do you have in there?
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Just a guess ...but I'd say about 10 - 12 lbs. It is a very stable tank. Been up for well over 2 years now and have never lost a specimen, vertibrate or invertebrate.
Great source of pleasure and distraction while I'm waiting for my next dive trip.