a salt bath is adding about 3 teaspoons of aqaurium salt to 1 measured cup of water dipping the fish in the bath for about 5-10 seconds and then putting him back in the mainsytem for 2-3 mins and repeat 3-5 times. DUe that only if its ich, and use caution this should not be used on delciate or very hyper sensitve fish, most mollies will do fine with a salt bath. Ich can usally be cured by adding salt into the main system and raising the main system temp over 83, i have never used an ich medication because it is so easily cured by just raisng the temp. I also jsut got reading an article about 2 new bacterias inside the ich parasite that were not known to science until know. They went on to talking about using a gram postive anti-biotic in conjuction with any type of ich treatment. My last treatment of an ich outbreak at work was cured by raising the temp to 84 and adding Maracyn into the main system 5 days later all 85 fish that had ich were still alive and had no signs of ich.