I set up a RR 65g I've had sitting in my shed for months. Well low and behold I go to put the return in and find it does not match the tank -the pvc and fitting on end slipped right through the drilled hole. So my question is where do you find the part that screws into the end of the pvc to which you fasten the nut on the other side of the tank? Does Home Depot have them?