In addition... they should both be plugged in to a GFCI or be a powerstrip which includes a GFCI. Aquarium equipment should never be plugged in to a standard outlet or regular old surge protector.
"What, exactly, is the internet? Basically it is a global network exchanging digitized data in such a way that any computer, anywhere, that is equipped with a device called a 'modem', can make a noise like a duck choking on a kazoo." - Dave Barry