HYPO salinity or low salinity.
A known method to break down the stomonts. The stage the WS is on the substrate in a "pod" multiplying. But it is not 100% effective. I think its only about 70%, do not have that link anymore.
But fish can handle hypo, not corals or inverts. Also fish can only tolerate hypo for a few weeks at most. Not even sure how much.
So Hypo is not the trusted answer. Some stomont pods still survive and you will have a reinfection.
Only other method to attach or destroy the stomont is to dry it out. That fact form the basis for the bucket method. If you cannot remove the parasite from the fish environment, then remove the infected environment from the fish.