Zoodiver;4299504; said:Turn you temp down. And if you're adding salt, don't do daily water changes...you're only removing the salt you're adding.
Run them between 75-77F. The parasite (if it is 'lice') will breed and go through the life cycle faster at higher temps.
What else is in the tank? You may need to take action to break the life cycle, like formalin or some type of chiton prohibitor (which prevents the molting phases as the parasite grows).