Neither table salt nor epsom salt will not affect bio filtration. It is a small amount, and meant for about 2 weeks. You could increase it on the second day to about 1/2 teaspoon of epsom salt per 10 gallon and treat for one week.
The bath is at 1/4 teaspoon of epsom per gallon is meant to reduce swelling quicker, but only temporary for 30 minutes, and so that it won't stress out the fish too much.
The bath is at 1/4 teaspoon of epsom per gallon is meant to reduce swelling quicker, but only temporary for 30 minutes, and so that it won't stress out the fish too much.