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Old 11-01-2007, 11:52 PM
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Default catode turned black

in my new tank im using big aluminium catodes, but im my old tank i used aluminium catodes too, in the old tank i left the catodes in the tank and it turned black!!! is my acid concentration doing that? or they will always turned black if i left them in the tank?
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Old 11-02-2007, 12:30 AM
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Default Re: catode turned black

Its normal.

Switch to lead sheeting
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