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Thread: CO2 bottle cost
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Old 12-03-2012, 04:09 PM   #11
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Yes that's exactly right. You're swapping out of their stock inventory of *steel not aluminum* tanks. Some are rough, some are brand new. If you're like me and hide all this nonsense under your stand it matters not one whit what color or condition they're in. All I worry about is whether the valve blows a hole in the roof as it detaches from the bottle and takes the aquarium and room with it. I don't think aluminum tanks stand out as a safer alternative, hence my use of swappers.

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