Are you sure? In that picture it specifically looks like only one hose end is attached to the pump while the other is dangling and emptying out into the tank.

Are you sure? In that picture it specifically looks like only one hose end is attached to the pump while the other is dangling and emptying out into the tank. edit: They've even zip tied it to that PVC to keep it from coming loose, which wouldn't be an issue if it was in fact attached to the pump.