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Reef Tank DIY - For Dummies
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12-11-2017, 04:06 AM
WarDog
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Join Date: Mar 2013
Location: Maple Ridge, BC
Posts: 3,106
I had both below the water line in the sump. When set up properly, the main drain is dead silent. If and when the emergency is used you'll know it, as it makes a crap load of noise either way.
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