How to Reduce the Risk of Flooding with Hang-on-Back Overflows

Marine aquarium hobbyists whose tanks didn’t come with a built-in overflow or can’t be drilled to accommodate one (i.e., those made of tempered glass) sometimes choose to use a siphon-based hang-on-back (HOB) overflow to feed water from the aquarium to a sump. These overflows come in different designs, but they’re all more or less a … [Read More]