i am setting up a 22 gl sump for my 60 gallon tank my ? is can i use a magnum 350 as a return pump. i am also woundering if a pvc over flow is safe in terms of keeping it from flooding. if so does any one have any drawings of a pvc overflow? so i could build one i am looking for somthing to hang on the back of the tank cuz my tank is not drilled .thank in advace and hope to get some good ideas.