The pic is attached below, as you can see one is healthy and the other's body is getting deformed slowly and has white patches on the head. Sorry the pic isnt clearer since they don't exactly wait in one spot.Pic of the white spots you suspect are ich? Might not even be ich.....
When were the fish added and have you added anything new lately? Last 2 weeks?
Best to try and diagnose a probable issue before treating with meds. The wrong ones can cause more damage.
The fish were added about a month ago, no problems until two weeks back. The only thing i can think of is that i added a shower filter and used that water since it's suppsed to get rid of most water contaminants (not all, but atleast whatever large particles). Will do a water change with normal tap water (treated with prime and stress guard) to see if it helps.