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sump. overflow

  1. DIY Forum
    Ok I have a 45 gallon folr system and was just running fluval 404. Decided to go to sump made one out of 20 gallong long. Using the rio 2500 return pump and corallife 125 skimmer. My question is since the tank is already full and cannot drill. I am using my fluval 404 with the cannister empty as...
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