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04/15/2010, 07:12 PM
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Registered Member
Join Date: Mar 2008
Posts: 13
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Over flow boxes running slow
Water doesn't flow down drains as quickly as it used to. I have a marineland 220 with corner overflow boxes. The water in one of the boxes is as high as the vent tube. Do they need to be cleaned in any way. The tank has been set up for about two years. Please advise
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