What I have done in the meantime is dial down my drain via the ball valve. I know this is not an ideal solution because now things can get stuck in there. I am going to go try the tubing trick and see if that works. In the next couple of days I will try Mike's idea. I guess it wasn't really belching but...just throwing a lot of water into the sump and roiling it something fierce. The salt creep would have been astronomical.