SuncrestReef
That Apex guy
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Reef Tank 365
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Isn't it possible for the ATO to malfunction and pump all top off water into sump?
The ATK has 4 layers of protection to prevent this. See my ATK Tutorial for details: https://www.reef2reef.com/ams/neptu...torials-part-3-automatic-top-off-kit-atk.692/