Any help is much apreciated as my father in law usually helps with this and is away! My tropical aquarium filter tube popped out when i was cleaning the tank today and the filter is now making a horrid gurgling noise, I believe i have broken the air and suction seal? My father in law usually adds more water to the 3 layer filter and sucks the tube (yuck). If anyone could give me a simple guide to fix this I would be very appreciative..