I have an siphon break hole in the tubing above the waterline of the reservoir (garbage can). It will spray some water so you might want a lid or keep it down far enough in the container so it doesn't matter. Keeping the outlet above the water in the sump will keep it from siphoning back the other way.
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Brian
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220g inwall 48"x36"x30"
110g mangrove refug/sump
Poison Dart Frog Vivarium
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