Hi glutenfreemama. I'm so sorry you're going through all this.
From the pics and your description of his symptoms, it sounds like there's a distinct possibility your boy has either gill/skin flukes or anchor worms. I'm leaning toward anchor worms because they are more often visible, whereas flukes have to get quite big before they can be seen with the naked eye.
There are two routes you can go with this. One is the natural route suggested by OFL. Unfortunately, I don't think AQ salt kills anchor worms or flukes as it does with so many other parasites. At most, it will help your boy create enough slime coat that the worms*may* fall off.
For medical treatment you have a few options. A readily available med is API General Cure, which may or may not be effective. If he has gill/skin flukes, it should help but if he has anchor worms, he may need a very potent medication called Clout. Clout kills just about any kind of protozoan imaginable.
Another option to try is a formalin-based medication. Care must be taken not to overdose with either Clout or formalin; the latter is actually a form of formaldehyde. You may need to order these medications online (try www.drsfostersmith.com
) or go to a local aquarium store.
Your female may, possibly, have a tumor. :( Is she eating and pooping normally? If she is but she still has that bulge, my best guess is tumor. An affected fish can live comfortable for quite some time with tumors, though. I have two girls right now who have enormous tumors but they are doing well. If you can describe your female's symptoms a little more, I might be able to tell if it's parasitic or not.