If you added salt to your tank already, watch your clowns very closely. If it was me, I'd vacuum the gravel and do a 50%
water change to remove most of the salt. Clown loaches are one of those fish that has no scales, and the salt is very irritating to them. They don't tolerate it very well. However,
this article talks about using salt in treating scaleless fish with salt, so I recommend you read the article completely and decide how you want to handle this.
Here is another great article to help you decide on how you want to treat your clowns. There are a lot of choices. It looks like raising the temp. will work with whatever path you decide to take.
http://www.aquatic-hobbyist.com/prof...water/ich.html