3 Pieces of Equipment You Should NEVER Use

3 Pieces of Equipment You Should NEVER Use: "#1: Hang on the Back (HOB) Overflow Boxes

HOB overflow boxes came about so people with non reef-ready tanks (tanks that are not drilled) could use a sump. HOB overflows work by creating a syphon to draw water over the top of your tank and then down into your sump. When the syphon breaks, then your return pump in your sump pumps all the water in your sump into your tank, causing an overflow."



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