Also you will definitely need more then one exit hole from the sump. You will want a dry emergency drain. Meaning a hole that is dry all the time unless the first one is blocked and then the water level rises to a point where the dry emergency is no longer dry and instead is in use. If you don't have this and the first hole gets clogged (even partially clogged) the water level rises until your pump empties your tank unto your floor.
Point taken! New hole going in tomorrow! Thank you!!