Crabs McJones
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Basically my sump sits lower then my ATO reservoir. So if you put a hole in the hose inside the reservoir it creates an air break so that instead of siphoning freshwater into your sump, the air breaks the siphon and stops it from continually draining freshwater into my system.Once you start a siphon into sump with ato pump how would a hole in res stop siphon (ato to sump). ttubing not in sump so no back siphon