In my opinion - you are overstocked.
If all of these frogs are showing bloating it is usually a clear sign that the water is very poor quality.
Do you filter?
How often do you do a water change, how much do you take out, how exactly do you do one, and how do you treat the water going back in?
What do you feed, how often and how much?
You should not house corydoras with ACF - they have very tiny spines on their fins and if an ACF goes to eat one it is a painful death for both creatures.
Start by setting up a quarantine tank - for this many frogs it should be at least a 20 gallon long and have no substrate.
Use another container, or in this case containers (one per frog) for salt baths.
Use Epsom salt, 1 teaspoon per one gallon of water, in the containers (NOT the quarantine tank!) for salt baths. Decholorinate the water like you would for their tank and leave them in the bath for about one hour. Then discard the bath water and return the frog to the quarantine tank. You will not see immediate results....this needs to be done for a couple of weeks.
This will hopefully help treat the soft bloat (there are two types of bloat and yours seem to have the soft bloat). In the meantime we need to figure out what caused it. If it was one frog it could be a kidney defect. Multiple frogs in the same tank indicate that there is a serious problem with their environment unfortunately.