AZDesertRat
In Memoriam
I have never had a tank flood in 17 years of reefing and longer than that with fish only tanks. My current 100G is drilled with an internal overflow and standpipe which is an important factor in flood prevention. The internal overflow is very reliable and the returns were planned from the very beginning to be place high enough to control backsiphonage or back flow. My sump is large enough to easily contain any worst case backflow and then some. All key pieces of a flood free system.
No need for siphon break holes or check valves
No need for siphon break holes or check valves