You can find Tricide Neo on line. It is as per manufacturers instructions a bath. I think it is too big an area for the dry powder application that some have used for sores. I like using a squirt bottle to keep the fish wetted with the Tricide Neo for the duration as per instructions. I mix 1/4 of the one gallon size packet with a quart of water and use a squirt bottle to keep the fish wetted. This does require putting the fish to sleep with oil of cloves or MS-222, while you work on it, where as the bath just requires a sufficient size container to submerge the fish, but using as a bath is much more expensive and for a fish of this size, I would guess the 5 gallon size packet would be needed for each of the three baths.
Zone 7 A/B
Keep your words sweet. You never know when you may have to eat them.
Richard