hey- i am setting up a wet dry filter for my aquarium. sometimes we get brownouts around my area at the worst times, like when i am at work. so, if i setup a wet dry system and a brownout occurs, is there a way to prevent water from siphoning into the wet dry filter from the fish tank? its a diy overflow setup using .5" pvc pipe with a queit one 2200 return pump. aquarium is a 75 gallon, diy stand and stuff. thanks.