EricTMah
Aquariums by Design
You'll always get some water back flowing into your sump when power is out. Depending how low your return lines are in the tank and if you drill a siphon breaking hole. You're probably looking at 5-7 gals roughly. That's why most sumps you don't run them full to the top to compensate for the back flow.
You can use check valves. But I've never trusted them as they can get clogged quite easily.
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You can use check valves. But I've never trusted them as they can get clogged quite easily.
Sent from my Z30 using Tapatalk 2