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Old 04-11-2008, 05:42 PM   #17
tommy818
tommy818
Join Date: Mar 2008
Location: bronx ny
Posts: 154
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i use the doser from esv.u need a air pump with 2 outlets and a digital timer.u need to check the check valves now and then to make sure they dont get clogged.other than that its hands free.
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